diff --git a/Libraries/SPTarkov.Server.Core/Controllers/InventoryController.cs b/Libraries/SPTarkov.Server.Core/Controllers/InventoryController.cs
index 2bec0c98..c958ad09 100644
--- a/Libraries/SPTarkov.Server.Core/Controllers/InventoryController.cs
+++ b/Libraries/SPTarkov.Server.Core/Controllers/InventoryController.cs
@@ -161,7 +161,7 @@ public class InventoryController(
         if (itemToAdjust is null)
         {
             _logger.Error(
-                $"Unable find item: {request.Item} to: {request.State} on player {sessionId}to: "
+                $"Unable find item: {request.Item.Value.ToString()} to: {request.State} on player: {sessionId} to: "
             );
 
             return;
diff --git a/Libraries/SPTarkov.Server.Core/Extensions/ItemExtensions.cs b/Libraries/SPTarkov.Server.Core/Extensions/ItemExtensions.cs
index 1c513589..6f1074c7 100644
--- a/Libraries/SPTarkov.Server.Core/Extensions/ItemExtensions.cs
+++ b/Libraries/SPTarkov.Server.Core/Extensions/ItemExtensions.cs
@@ -286,16 +286,16 @@ namespace SPTarkov.Server.Core.Extensions
         /// <returns>list of Item objects</returns>
         public static List<Item> FindAndReturnChildrenAsItems(
             this IEnumerable<Item> items,
-            string baseItemId,
+            MongoId baseItemId,
             bool modsOnly = false
         )
         {
             // Use dictionary to make key lookup faster, convert to list before being returned
-            OrderedDictionary<string, Item> result = [];
+            OrderedDictionary<MongoId, Item> result = [];
             foreach (var childItem in items)
             {
                 // Include itself
-                if (string.Equals(childItem.Id, baseItemId, StringComparison.Ordinal))
+                if (childItem.Id == baseItemId)
                 {
                     // Root item MUST be at 0 index for things like flea market offers
                     result.Insert(0, childItem.Id, childItem);
@@ -311,7 +311,8 @@ namespace SPTarkov.Server.Core.Extensions
                 // Items parentId matches root item AND returned items doesn't contain current child
                 if (
                     !result.ContainsKey(childItem.Id)
-                    && string.Equals(childItem.ParentId, baseItemId, StringComparison.Ordinal)
+                    && childItem.ParentId != "hideout"
+                    && childItem.ParentId == baseItemId
                 )
                 {
                     foreach (var item in FindAndReturnChildrenAsItems(items, childItem.Id))
diff --git a/Libraries/SPTarkov.Server.Core/Extensions/ProfileExtensions.cs b/Libraries/SPTarkov.Server.Core/Extensions/ProfileExtensions.cs
index 37ecc9a4..33b42e28 100644
--- a/Libraries/SPTarkov.Server.Core/Extensions/ProfileExtensions.cs
+++ b/Libraries/SPTarkov.Server.Core/Extensions/ProfileExtensions.cs
@@ -1,4 +1,5 @@
-using SPTarkov.Server.Core.Models.Eft.Common;
+using SPTarkov.Server.Core.Models.Common;
+using SPTarkov.Server.Core.Models.Eft.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 using SPTarkov.Server.Core.Models.Enums;
 
@@ -125,7 +126,7 @@ namespace SPTarkov.Server.Core.Extensions
             return pmcData.IsParentInStash(itemToCheck.Id);
         }
 
-        public static bool IsParentInStash(this PmcData pmcData, string itemId)
+        public static bool IsParentInStash(this PmcData pmcData, MongoId itemId)
         {
             // Item not found / has no parent
             var item = pmcData.Inventory.Items.FirstOrDefault(item => item.Id == itemId);
diff --git a/Libraries/SPTarkov.Server.Core/Extensions/TraderAssortExtensions.cs b/Libraries/SPTarkov.Server.Core/Extensions/TraderAssortExtensions.cs
index 2267743f..38740663 100644
--- a/Libraries/SPTarkov.Server.Core/Extensions/TraderAssortExtensions.cs
+++ b/Libraries/SPTarkov.Server.Core/Extensions/TraderAssortExtensions.cs
@@ -1,4 +1,5 @@
-using SPTarkov.Server.Core.Models.Eft.Common.Tables;
+using SPTarkov.Server.Core.Models.Common;
+using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Extensions
 {
@@ -14,7 +15,7 @@ namespace SPTarkov.Server.Core.Extensions
         /// <returns>Modified assort</returns>
         public static TraderAssort RemoveItemFromAssort(
             this TraderAssort assort,
-            string itemId,
+            MongoId itemId,
             bool isFlea = false
         )
         {
diff --git a/Libraries/SPTarkov.Server.Core/Generators/BotEquipmentModGenerator.cs b/Libraries/SPTarkov.Server.Core/Generators/BotEquipmentModGenerator.cs
index d1505a1c..4a91f027 100644
--- a/Libraries/SPTarkov.Server.Core/Generators/BotEquipmentModGenerator.cs
+++ b/Libraries/SPTarkov.Server.Core/Generators/BotEquipmentModGenerator.cs
@@ -84,6 +84,17 @@ public class BotEquipmentModGenerator(
         "cartridges",
     ];
 
+    const string modRecieverKey = "mod_reciever";
+    const string modMount001Key = "mod_mount_001";
+    const string modGasBlockKey = "mod_gas_block";
+    const string modPistolGrip = "mod_pistol_grip";
+    const string modStockKey = "mod_stock";
+    const string modBarrelKey = "mod_barrel";
+    const string modHandguardKey = "mod_handguard";
+    const string modMountKey = "mod_mount";
+    const string modScopeKey = "mod_scope";
+    const string modScope000Key = "mod_scope_000";
+
     protected readonly BotConfig _botConfig = _configServer.GetConfig<BotConfig>();
 
     /// <summary>
@@ -186,7 +197,8 @@ public class BotEquipmentModGenerator(
                 );
                 switch (plateSlotFilteringOutcome.Result)
                 {
-                    case Result.UNKNOWN_FAILURE or Result.NO_DEFAULT_FILTER:
+                    case Result.UNKNOWN_FAILURE
+                    or Result.NO_DEFAULT_FILTER:
                         if (_logger.IsLogEnabled(LogLevel.Debug))
                         {
                             _logger.Debug(
@@ -929,7 +941,7 @@ public class BotEquipmentModGenerator(
     /// <returns>Sorted array</returns>
     public HashSet<string> SortModKeys(
         HashSet<string> unsortedSlotKeys,
-        string itemTplWithKeysToSort
+        MongoId itemTplWithKeysToSort
     )
     {
         // No need to sort with only 1 item in array
@@ -941,16 +953,6 @@ public class BotEquipmentModGenerator(
         var isMount = _itemHelper.IsOfBaseclass(itemTplWithKeysToSort, BaseClasses.MOUNT);
 
         HashSet<string> sortedKeys = [];
-        const string modRecieverKey = "mod_reciever";
-        const string modMount001Key = "mod_mount_001";
-        const string modGasBlockKey = "mod_gas_block";
-        const string modPistolGrip = "mod_pistol_grip";
-        const string modStockKey = "mod_stock";
-        const string modBarrelKey = "mod_barrel";
-        const string modHandguardKey = "mod_handguard";
-        const string modMountKey = "mod_mount";
-        const string modScopeKey = "mod_scope";
-        const string modScope000Key = "mod_scope_000";
 
         // Mounts are a special case, they need scopes first before more mounts
         if (isMount)
diff --git a/Libraries/SPTarkov.Server.Core/Generators/BotInventoryGenerator.cs b/Libraries/SPTarkov.Server.Core/Generators/BotInventoryGenerator.cs
index cc1c24ec..e7d09b79 100644
--- a/Libraries/SPTarkov.Server.Core/Generators/BotInventoryGenerator.cs
+++ b/Libraries/SPTarkov.Server.Core/Generators/BotInventoryGenerator.cs
@@ -645,7 +645,7 @@ public class BotInventoryGenerator(
     /// <param name="equipmentBlacklist">Blacklist to filter mod pool with</param>
     /// <returns>Filtered pool of mods</returns>
     public Dictionary<string, HashSet<MongoId>> GetFilteredDynamicModsForItem(
-        string itemTpl,
+        MongoId itemTpl,
         Dictionary<string, HashSet<MongoId>> equipmentBlacklist
     )
     {
diff --git a/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/CompletionQuestGenerator.cs b/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/CompletionQuestGenerator.cs
index fbfdb2dd..a0311145 100644
--- a/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/CompletionQuestGenerator.cs
+++ b/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/CompletionQuestGenerator.cs
@@ -394,7 +394,7 @@ public class CompletionQuestGenerator(
     /// <param name="completionConfig">Completion config from quest.json</param>
     /// <returns>object of "Completion"-condition</returns>
     protected QuestCondition GenerateCondition(
-        string itemTpl,
+        MongoId itemTpl,
         double value,
         Completion completionConfig
     )
diff --git a/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/RepeatableQuestRewardGenerator.cs b/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/RepeatableQuestRewardGenerator.cs
index f82a0cad..88deb6cf 100644
--- a/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/RepeatableQuestRewardGenerator.cs
+++ b/Libraries/SPTarkov.Server.Core/Generators/RepeatableQuestGeneration/RepeatableQuestRewardGenerator.cs
@@ -818,7 +818,7 @@ public class RepeatableQuestRewardGenerator(
     /// <param name="itemBaseWhitelist"> Default null, specific trader item base classes</param>
     /// <returns> True if item is valid reward </returns>
     public bool IsValidRewardItem(
-        string tpl,
+        MongoId tpl,
         HashSet<MongoId> itemTplBlacklist,
         HashSet<MongoId> itemTypeBlacklist,
         List<MongoId>? itemBaseWhitelist = null
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/DialogueHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/DialogueHelper.cs
index 92014615..b584130c 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/DialogueHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/DialogueHelper.cs
@@ -1,4 +1,5 @@
 using SPTarkov.DI.Annotations;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 using SPTarkov.Server.Core.Models.Eft.Profile;
 using SPTarkov.Server.Core.Models.Utils;
@@ -46,7 +47,7 @@ public class DialogueHelper(ISptLogger<DialogueHelper> logger, ProfileHelper pro
     /// <param name="sessionID">Session/player id</param>
     /// <param name="itemId">Item being moved to inventory</param>
     /// <returns>Collection of items from message</returns>
-    public List<Item> GetMessageItemContents(string messageID, string sessionID, string itemId)
+    public List<Item> GetMessageItemContents(string messageID, string sessionID, MongoId itemId)
     {
         var fullProfile = profileHelper.GetFullProfile(sessionID);
         var dialogueData = fullProfile.DialogueRecords;
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/InRaidHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/InRaidHelper.cs
index 3361d36f..e899a098 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/InRaidHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/InRaidHelper.cs
@@ -65,23 +65,27 @@ public class InRaidHelper(
         var insured = _cloner.Clone(serverProfile.InsuredItems);
 
         // Remove equipment and loot items stored on player from server profile in preparation for data from client being added
-        _inventoryHelper.RemoveItem(serverProfile, serverProfile.Inventory.Equipment, sessionID);
+        _inventoryHelper.RemoveItem(
+            serverProfile,
+            serverProfile.Inventory.Equipment.Value,
+            sessionID
+        );
 
         // Remove quest items stored on player from server profile in preparation for data from client being added
         _inventoryHelper.RemoveItem(
             serverProfile,
-            serverProfile.Inventory.QuestRaidItems,
+            serverProfile.Inventory.QuestRaidItems.Value,
             sessionID
         );
 
         // Get all items that have a parent of `serverProfile.Inventory.equipment` (All items player had on them at end of raid)
         var postRaidInventoryItems = postRaidProfile.Inventory.Items.FindAndReturnChildrenAsItems(
-            postRaidProfile.Inventory.Equipment
+            postRaidProfile.Inventory.Equipment.Value
         );
 
         // Get all items that have a parent of `serverProfile.Inventory.questRaidItems` (Quest items player had on them at end of raid)
         var postRaidQuestItems = postRaidProfile.Inventory.Items.FindAndReturnChildrenAsItems(
-            postRaidProfile.Inventory.QuestRaidItems
+            postRaidProfile.Inventory.QuestRaidItems.Value
         );
 
         // Handle Removing of FIR status if player did not survive + not transferring
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/InventoryHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/InventoryHelper.cs
index e1b0d9b1..3b5dd9f7 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/InventoryHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/InventoryHelper.cs
@@ -480,12 +480,12 @@ public class InventoryHelper(
     /// <param name="output">OPTIONAL - ItemEventRouterResponse</param>
     public void RemoveItem(
         PmcData profile,
-        string? itemId,
+        MongoId itemId,
         string sessionId,
         ItemEventRouterResponse? output = null
     )
     {
-        if (itemId is null)
+        if (itemId.IsEmpty())
         {
             _logger.Warning(
                 _serverLocalisationService.GetText("inventory-unable_to_remove_item_no_id_given")
@@ -617,13 +617,13 @@ public class InventoryHelper(
     /// <returns>ItemEventRouterResponse</returns>
     public ItemEventRouterResponse RemoveItemByCount(
         PmcData pmcData,
-        string? itemId,
+        MongoId itemId,
         int countToRemove,
         string sessionId,
         ItemEventRouterResponse? output
     )
     {
-        if (itemId is null)
+        if (itemId.IsEmpty())
         {
             return output;
         }
@@ -992,12 +992,12 @@ public class InventoryHelper(
     ///     Based on the item action, determine whose inventories we should be looking at for from and to.
     /// </summary>
     /// <param name="request">Item interaction request</param>
-    /// <param name="item">Item being moved/split/etc to inventory</param>
+    /// <param name="itemId">Item being moved/split/etc to inventory</param>
     /// <param name="sessionId">Session id / players Id</param>
     /// <returns>OwnerInventoryItems with inventory of player/scav to adjust</returns>
     public OwnerInventoryItems GetOwnerInventoryItems(
         InventoryBaseActionRequestData request,
-        string? item,
+        MongoId itemId,
         string sessionId
     )
     {
@@ -1021,7 +1021,7 @@ public class InventoryHelper(
                 fromInventoryItems = _dialogueHelper.GetMessageItemContents(
                     request.FromOwner.Id,
                     sessionId,
-                    item
+                    itemId
                 );
                 fromType = "mail";
             }
@@ -1356,7 +1356,7 @@ public class InventoryHelper(
     /// </summary>
     /// <param name="itemTpl">Container being opened</param>
     /// <returns>Reward details</returns>
-    public RewardDetails? GetRandomLootContainerRewardDetails(string itemTpl)
+    public RewardDetails? GetRandomLootContainerRewardDetails(MongoId itemTpl)
     {
         _inventoryConfig.RandomLootContainers.TryGetValue(itemTpl, out var result);
 
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/ItemHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/ItemHelper.cs
index 2c03c231..1c0a97d0 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/ItemHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/ItemHelper.cs
@@ -339,7 +339,7 @@ public class ItemHelper(
     /// </summary>
     /// <param name="itemTpl">Armor item</param>
     /// <returns>True if item needs some kind of insert</returns>
-    public bool ArmorItemHasRemovableOrSoftInsertSlots(string itemTpl)
+    public bool ArmorItemHasRemovableOrSoftInsertSlots(MongoId itemTpl)
     {
         if (!ArmorItemCanHoldMods(itemTpl))
         {
@@ -354,7 +354,7 @@ public class ItemHelper(
     /// </summary>
     /// <param name="itemTpl">Item tpl to check for plate support</param>
     /// <returns>True when armor can hold plates</returns>
-    public bool ArmorItemHasRemovablePlateSlots(string itemTpl)
+    public bool ArmorItemHasRemovablePlateSlots(MongoId itemTpl)
     {
         var itemTemplate = GetItem(itemTpl);
 
@@ -368,7 +368,7 @@ public class ItemHelper(
     /// </summary>
     /// <param name="itemTpl">Item tpl to check</param>
     /// <returns>True if it needs armor inserts</returns>
-    public bool ItemRequiresSoftInserts(string itemTpl)
+    public bool ItemRequiresSoftInserts(MongoId itemTpl)
     {
         // Not a slot that takes soft-inserts
         if (!ArmorItemCanHoldMods(itemTpl))
@@ -717,7 +717,7 @@ public class ItemHelper(
     /// <param name="itemIdToFind">Template id of item to check for</param>
     /// <param name="assort">List of items to check in</param>
     /// <returns>List of children of requested item</returns>
-    public List<Item> FindAndReturnChildrenByAssort(string itemIdToFind, List<Item> assort)
+    public List<Item> FindAndReturnChildrenByAssort(MongoId itemIdToFind, List<Item> assort)
     {
         List<Item> list = [];
         foreach (var itemFromAssort in assort)
@@ -1263,7 +1263,7 @@ public class ItemHelper(
     /// <param name="itemId">The unique identifier of the item for which to find the main parent.</param>
     /// <param name="itemsMap">A Dictionary containing item IDs mapped to their corresponding Item objects for quick lookup.</param>
     /// <returns>The Item object representing the top-most parent of the given item, or null if no such parent exists.</returns>
-    public Item? GetAttachmentMainParent(string itemId, Dictionary<MongoId, Item> itemsMap)
+    public Item? GetAttachmentMainParent(MongoId itemId, Dictionary<MongoId, Item> itemsMap)
     {
         var currentItem = itemsMap.FirstOrDefault(x => x.Key == itemId).Value;
 
@@ -1309,7 +1309,7 @@ public class ItemHelper(
     /// <param name="itemId">The unique identifier of the item for which to find the equipment parent.</param>
     /// <param name="itemsMap">A Dictionary containing item IDs mapped to their corresponding Item objects for quick lookup.</param>
     /// <returns>The Item object representing the equipment parent of the given item, or `null` if no such parent exists</returns>
-    public Item? GetEquipmentParent(string itemId, Dictionary<string, Item> itemsMap)
+    public Item? GetEquipmentParent(MongoId itemId, Dictionary<MongoId, Item> itemsMap)
     {
         var currentItem = itemsMap.GetValueOrDefault(itemId);
 
@@ -1731,7 +1731,7 @@ public class ItemHelper(
     /// </summary>
     /// <param name="itemTpl">Tpl of item to get name of</param>
     /// <returns>Full name, short name if not found</returns>
-    public string GetItemName(string itemTpl)
+    public string GetItemName(MongoId itemTpl)
     {
         var localeDb = _localeService.GetLocaleDb();
         var result = localeDb[$"{itemTpl} Name"];
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/QuestHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/QuestHelper.cs
index eaf92f55..0abab336 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/QuestHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/QuestHelper.cs
@@ -2,6 +2,7 @@ using System.Globalization;
 using SPTarkov.Common.Extensions;
 using SPTarkov.DI.Annotations;
 using SPTarkov.Server.Core.Extensions;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 using SPTarkov.Server.Core.Models.Eft.ItemEvent;
@@ -623,7 +624,7 @@ public class QuestHelper(
     /// <param name="output">ItemEvent router response</param>
     public void ChangeItemStack(
         PmcData pmcData,
-        string itemId,
+        MongoId itemId,
         int newStackSize,
         string sessionID,
         ItemEventRouterResponse output
@@ -1010,8 +1011,8 @@ public class QuestHelper(
     /// <param name="allQuests">All quests to check</param>
     /// <returns>quest id with 'FindItem' condition id</returns>
     public Dictionary<string, string> GetFindItemConditionByQuestItem(
-        string itemTpl,
-        string[] questIds,
+        MongoId itemTpl,
+        MongoId[] questIds,
         List<Quest> allQuests
     )
     {
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/RagfairOfferHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/RagfairOfferHelper.cs
index 84dbc02d..56e7e8ab 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/RagfairOfferHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/RagfairOfferHelper.cs
@@ -881,7 +881,7 @@ public class RagfairOfferHelper(
      * @param boughtAmount How many were purchased
      * @returns Localised message text
      */
-    protected string GetLocalisedOfferSoldMessage(string itemTpl, int boughtAmount)
+    protected string GetLocalisedOfferSoldMessage(MongoId itemTpl, int boughtAmount)
     {
         // Generate a message to inform that item was sold
         var globalLocales = _localeService.GetLocaleDb();
@@ -896,7 +896,7 @@ public class RagfairOfferHelper(
         }
 
         // Used to replace tokens in sold message sent to player
-        var messageKey = $"{itemTpl} Name";
+        var messageKey = $"{itemTpl.ToString()} Name";
         var hasKey = globalLocales.TryGetValue(messageKey, out var value);
 
         var tplVars = new SystemData
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/RagfairServerHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/RagfairServerHelper.cs
index 71104365..194161ca 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/RagfairServerHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/RagfairServerHelper.cs
@@ -99,7 +99,7 @@ public class RagfairServerHelper(
      * @param itemTemplateId Item tpl to check is blacklisted
      * @returns True if its blacklisted
      */
-    protected bool IsItemOnCustomFleaBlacklist(string itemTemplateId)
+    protected bool IsItemOnCustomFleaBlacklist(MongoId itemTemplateId)
     {
         return ragfairConfig.Dynamic.Blacklist.Custom.Contains(itemTemplateId);
     }
diff --git a/Libraries/SPTarkov.Server.Core/Helpers/TradeHelper.cs b/Libraries/SPTarkov.Server.Core/Helpers/TradeHelper.cs
index 4dd395be..ba5644e9 100644
--- a/Libraries/SPTarkov.Server.Core/Helpers/TradeHelper.cs
+++ b/Libraries/SPTarkov.Server.Core/Helpers/TradeHelper.cs
@@ -1,6 +1,7 @@
 using System.Text.RegularExpressions;
 using SPTarkov.DI.Annotations;
 using SPTarkov.Server.Core.Extensions;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 using SPTarkov.Server.Core.Models.Eft.Inventory;
@@ -414,7 +415,7 @@ public record PurchaseDetails
 
 public record PurchaseItems
 {
-    public string ItemId { get; set; }
+    public MongoId ItemId { get; set; }
 
     public double Count { get; set; }
 }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Common/IdWithCount.cs b/Libraries/SPTarkov.Server.Core/Models/Common/IdWithCount.cs
index 6f068842..88b2225c 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Common/IdWithCount.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Common/IdWithCount.cs
@@ -11,7 +11,7 @@ public record IdWithCount
     ///     ID of stack to take money from
     /// </summary>
     [JsonPropertyName("id")]
-    public string? Id { get; set; }
+    public MongoId Id { get; set; }
 
     /// <summary>
     ///     Amount of money to take off player for treatment
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs
index beff1c13..c5eec3fc 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs
@@ -571,7 +571,7 @@ public record DroppedItem
 
     public string? QuestId { get; set; }
 
-    public string? ItemId { get; set; }
+    public MongoId? ItemId { get; set; }
 
     public string? ZoneId { get; set; }
 }
@@ -583,7 +583,7 @@ public record FoundInRaidItem
 
     public string? QuestId { get; set; }
 
-    public string? ItemId { get; set; }
+    public MongoId? ItemId { get; set; }
 }
 
 public record Victim
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Quest.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Quest.cs
index 6ee0244b..2d477bfc 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Quest.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Quest.cs
@@ -21,7 +21,7 @@ public record Quest
     ///     _id
     /// </summary>
     [JsonPropertyName("_id")]
-    public required string Id { get; set; }
+    public required MongoId Id { get; set; }
 
     [JsonPropertyName("canShowNotificationsInGame")]
     public required bool CanShowNotificationsInGame { get; set; }
@@ -145,7 +145,7 @@ public record QuestStatus
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("qid")]
-    public required string QId { get; set; }
+    public required MongoId QId { get; set; }
 
     [JsonPropertyName("startTime")]
     public required double StartTime { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Trader.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Trader.cs
index 0131c897..1972b057 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Trader.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/Trader.cs
@@ -260,10 +260,10 @@ public record TraderAssort
     public List<Item>? Items { get; set; }
 
     [JsonPropertyName("barter_scheme")]
-    public Dictionary<string, List<List<BarterScheme>>>? BarterScheme { get; set; }
+    public Dictionary<MongoId, List<List<BarterScheme>>>? BarterScheme { get; set; }
 
     [JsonPropertyName("loyal_level_items")]
-    public Dictionary<string, int>? LoyalLevelItems { get; set; }
+    public Dictionary<MongoId, int>? LoyalLevelItems { get; set; }
 }
 
 public record BarterScheme
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidEatRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidEatRequestData.cs
index 4a480ecc..a5f2e255 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidEatRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidEatRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Inventory;
 
 namespace SPTarkov.Server.Core.Models.Eft.Health;
@@ -9,7 +10,7 @@ public record OffraidEatRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId Item { get; set; }
 
     [JsonPropertyName("count")]
     public int? Count { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidHealRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidHealRequestData.cs
index 000de8ca..8fb42d6f 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidHealRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Health/OffraidHealRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Inventory;
 
 namespace SPTarkov.Server.Core.Models.Eft.Health;
@@ -9,7 +10,7 @@ public record OffraidHealRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId Item { get; set; }
 
     [JsonPropertyName("part")]
     public string? Part { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Hideout/HideoutCustomisation.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Hideout/HideoutCustomisation.cs
index b3307c29..68de6c8d 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Hideout/HideoutCustomisation.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Hideout/HideoutCustomisation.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Models.Eft.Hideout;
@@ -39,7 +40,7 @@ public record HideoutCustomisationGlobal
     public bool? IsEnabled { get; set; }
 
     [JsonPropertyName("itemId")]
-    public string? ItemId { get; set; }
+    public MongoId? ItemId { get; set; }
 }
 
 public record HideoutCustomisationSlot
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/AddItemRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/AddItemRequestData.cs
index dcb2be2e..e9e053ad 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/AddItemRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/AddItemRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
 
@@ -29,5 +30,5 @@ public record ItemToAdd
     public bool? IsPreset { get; set; }
 
     [JsonPropertyName("item_id")]
-    public string? ItemId { get; set; }
+    public MongoId? ItemId { get; set; }
 }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryAddRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryAddRequestData.cs
index a00657b3..77cf35ee 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryAddRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryAddRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
 
@@ -8,7 +9,7 @@ public record InventoryAddRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId? Item { get; set; }
 
     [JsonPropertyName("container")]
     public Container? Container { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryBindRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryBindRequestData.cs
index 7c6890ae..5619f309 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryBindRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryBindRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
 
@@ -8,7 +9,7 @@ public record InventoryBindRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId Item { get; set; }
 
     [JsonPropertyName("index")]
     public string? Index { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryCreateMarkerRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryCreateMarkerRequestData.cs
index 54baa978..ac0288a7 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryCreateMarkerRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryCreateMarkerRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
@@ -9,7 +10,7 @@ public record InventoryCreateMarkerRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId? Item { get; set; }
 
     [JsonPropertyName("mapMarker")]
     public MapMarker? MapMarker { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryDeleteMarkerRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryDeleteMarkerRequestData.cs
index cf8d9920..efaf2991 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryDeleteMarkerRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryDeleteMarkerRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
 
@@ -8,7 +9,7 @@ public record InventoryDeleteMarkerRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId? Item { get; set; }
 
     [JsonPropertyName("X")]
     public int? X { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryEditMarkerRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryEditMarkerRequestData.cs
index 625ea02f..5ab0b9bd 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryEditMarkerRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/InventoryEditMarkerRequestData.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
@@ -9,7 +10,7 @@ public record InventoryEditMarkerRequestData : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId? Item { get; set; }
 
     [JsonPropertyName("X")]
     public double? X { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/PinOrLockItemRequest.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/PinOrLockItemRequest.cs
index 60a0157a..71f254ef 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/PinOrLockItemRequest.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Inventory/PinOrLockItemRequest.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Models.Eft.Inventory;
@@ -12,7 +13,7 @@ public record PinOrLockItemRequest : InventoryBaseActionRequestData
     ///     Id of item being pinned
     /// </summary>
     [JsonPropertyName("Item")]
-    public string? Item { get; set; }
+    public MongoId? Item { get; set; }
 
     /// <summary>
     ///     "Pinned"/"Locked"/"Free"
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/ItemEvent/ItemEventRouterRequest.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/ItemEvent/ItemEventRouterRequest.cs
index 49281c06..0aa1490a 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/ItemEvent/ItemEventRouterRequest.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/ItemEvent/ItemEventRouterRequest.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Request;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 using SPTarkov.Server.Core.Models.Utils;
@@ -29,7 +30,7 @@ public record Daum
     public string? Action { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId? Item { get; set; }
 
     [JsonPropertyName("items")]
     public List<Item>? Items { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Trade/ProcessBuyTradeRequestData.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Trade/ProcessBuyTradeRequestData.cs
index 6432180e..2893526f 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Trade/ProcessBuyTradeRequestData.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Trade/ProcessBuyTradeRequestData.cs
@@ -6,7 +6,7 @@ namespace SPTarkov.Server.Core.Models.Eft.Trade;
 public record ProcessBuyTradeRequestData : ProcessBaseTradeRequestData
 {
     [JsonPropertyName("item_id")]
-    public string? ItemId { get; set; }
+    public MongoId ItemId { get; set; }
 
     [JsonPropertyName("count")]
     public int? Count { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Wishlist/ChangeWishlistItemCategoryRequest.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Wishlist/ChangeWishlistItemCategoryRequest.cs
index 3ce50073..54c8671c 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Wishlist/ChangeWishlistItemCategoryRequest.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Wishlist/ChangeWishlistItemCategoryRequest.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Inventory;
 
 namespace SPTarkov.Server.Core.Models.Eft.Wishlist;
@@ -9,7 +10,7 @@ public record ChangeWishlistItemCategoryRequest : InventoryBaseActionRequestData
     public Dictionary<string, object>? ExtensionData { get; set; }
 
     [JsonPropertyName("item")]
-    public string? Item { get; set; }
+    public MongoId Item { get; set; }
 
     [JsonPropertyName("category")]
     public int? Category { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Spt/Fence/CreateFenceAssortsResult.cs b/Libraries/SPTarkov.Server.Core/Models/Spt/Fence/CreateFenceAssortsResult.cs
index 62871cab..b4310cb1 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Spt/Fence/CreateFenceAssortsResult.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Spt/Fence/CreateFenceAssortsResult.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Models.Spt.Fence;
@@ -12,8 +13,8 @@ public record CreateFenceAssortsResult
     public List<List<Item>>? SptItems { get; set; }
 
     [JsonPropertyName("barter_scheme")]
-    public Dictionary<string, List<List<BarterScheme>>>? BarterScheme { get; set; }
+    public Dictionary<MongoId, List<List<BarterScheme>>>? BarterScheme { get; set; }
 
     [JsonPropertyName("loyal_level_items")]
-    public Dictionary<string, int>? LoyalLevelItems { get; set; }
+    public Dictionary<MongoId, int>? LoyalLevelItems { get; set; }
 }
diff --git a/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/NewItemDetails.cs b/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/NewItemDetails.cs
index 3cf4b235..eced0a90 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/NewItemDetails.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/NewItemDetails.cs
@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Tables;
 
 namespace SPTarkov.Server.Core.Models.Spt.Mod;
@@ -15,7 +16,7 @@ public record NewItemFromCloneDetails : NewItemDetailsBase
     ///     Id of the item to copy and use as a base
     /// </summary>
     [JsonPropertyName("itemTplToClone")]
-    public string? ItemTplToClone { get; set; }
+    public MongoId? ItemTplToClone { get; set; }
 
     /// <summary>
     ///     Item properties that should be applied over the top of the cloned base
@@ -85,7 +86,7 @@ public record CreateItemResult
     public bool? Success { get; set; }
 
     [JsonPropertyName("itemId")]
-    public string? ItemId { get; set; }
+    public MongoId? ItemId { get; set; }
 
     [JsonPropertyName("errors")]
     public List<string>? Errors { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Services/BotEquipmentModPoolService.cs b/Libraries/SPTarkov.Server.Core/Services/BotEquipmentModPoolService.cs
index ea26f278..4300fcce 100644
--- a/Libraries/SPTarkov.Server.Core/Services/BotEquipmentModPoolService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/BotEquipmentModPoolService.cs
@@ -19,11 +19,11 @@ public class BotEquipmentModPoolService(
     private readonly Lock _lockObject = new();
 
     private ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     >? _gearModPool;
     protected ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     > GearModPool
     {
@@ -37,11 +37,11 @@ public class BotEquipmentModPoolService(
     }
 
     private ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     >? _weaponModPool;
     protected ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     > WeaponModPool
     {
@@ -60,7 +60,7 @@ public class BotEquipmentModPoolService(
     /// <param name="inputItems"> Items to find related mods and store in modPool </param>
     /// <param name="poolType"> Mod pool to choose from e.g. "weapon" for weaponModPool </param>
     protected ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     > GeneratePool(IEnumerable<TemplateItem>? inputItems, string poolType)
     {
@@ -74,7 +74,7 @@ public class BotEquipmentModPoolService(
         }
 
         var pool =
-            new ConcurrentDictionary<string, ConcurrentDictionary<string, HashSet<MongoId>>>();
+            new ConcurrentDictionary<MongoId, ConcurrentDictionary<string, HashSet<MongoId>>>();
         foreach (var item in inputItems)
         {
             if (item.Properties is null)
@@ -176,7 +176,7 @@ public class BotEquipmentModPoolService(
     /// <param name="itemTpl"> Item to look up </param>
     /// <param name="slotName"> Slot to get compatible mods for </param>
     /// <returns> Hashset of tpls that fit the slot </returns>
-    public HashSet<MongoId> GetCompatibleModsForWeaponSlot(string itemTpl, string slotName)
+    public HashSet<MongoId> GetCompatibleModsForWeaponSlot(MongoId itemTpl, string slotName)
     {
         if (WeaponModPool.TryGetValue(itemTpl, out var value))
         {
@@ -195,7 +195,7 @@ public class BotEquipmentModPoolService(
     /// </summary>
     /// <param name="itemTpl"> Items tpl to look up mods for </param>
     /// <returns> Dictionary of mods (keys are mod slot names) with array of compatible mod tpls as value </returns>
-    public ConcurrentDictionary<string, HashSet<MongoId>> GetModsForGearSlot(string itemTpl)
+    public ConcurrentDictionary<string, HashSet<MongoId>> GetModsForGearSlot(MongoId itemTpl)
     {
         return GearModPool.TryGetValue(itemTpl, out var value) ? value : [];
     }
@@ -205,7 +205,7 @@ public class BotEquipmentModPoolService(
     /// </summary>
     /// <param name="itemTpl"> Weapons tpl to look up mods for </param>
     /// <returns> Dictionary of mods (keys are mod slot names) with array of compatible mod tpls as value </returns>
-    public ConcurrentDictionary<string, HashSet<MongoId>> GetModsForWeaponSlot(string itemTpl)
+    public ConcurrentDictionary<string, HashSet<MongoId>> GetModsForWeaponSlot(MongoId itemTpl)
     {
         return WeaponModPool.TryGetValue(itemTpl, out var value) ? value : [];
     }
@@ -215,7 +215,7 @@ public class BotEquipmentModPoolService(
     /// </summary>
     /// <param name="itemTpl"> Weapons tpl to look up mods for </param>
     /// <returns> Dictionary of mods (keys are mod slot names) with array of compatible mod tpls as value </returns>
-    public Dictionary<string, HashSet<MongoId>>? GetRequiredModsForWeaponSlot(string itemTpl)
+    public Dictionary<string, HashSet<MongoId>>? GetRequiredModsForWeaponSlot(MongoId itemTpl)
     {
         var result = new Dictionary<string, HashSet<MongoId>>();
 
@@ -248,7 +248,7 @@ public class BotEquipmentModPoolService(
     ///     Create weapon mod pool and set generated flag to true
     /// </summary>
     protected ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     > GenerateWeaponPool()
     {
@@ -266,7 +266,7 @@ public class BotEquipmentModPoolService(
     ///     Create gear mod pool and set generated flag to true
     /// </summary>
     protected ConcurrentDictionary<
-        string,
+        MongoId,
         ConcurrentDictionary<string, HashSet<MongoId>>
     > GenerateGearPool()
     {
diff --git a/Libraries/SPTarkov.Server.Core/Services/CircleOfCultistService.cs b/Libraries/SPTarkov.Server.Core/Services/CircleOfCultistService.cs
index 9f67d6a0..fbd46713 100644
--- a/Libraries/SPTarkov.Server.Core/Services/CircleOfCultistService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/CircleOfCultistService.cs
@@ -651,7 +651,7 @@ public class CircleOfCultistService(
     /// <param name="itemTpl">Item chosen</param>
     /// <param name="rewardPoolRemaining">Rouble amount of pool remaining to fill</param>
     /// <returns>Size of stack</returns>
-    protected int GetRewardStackSize(string itemTpl, int rewardPoolRemaining)
+    protected int GetRewardStackSize(MongoId itemTpl, int rewardPoolRemaining)
     {
         if (_itemHelper.IsOfBaseclass(itemTpl, BaseClasses.AMMO))
         {
diff --git a/Libraries/SPTarkov.Server.Core/Services/FenceService.cs b/Libraries/SPTarkov.Server.Core/Services/FenceService.cs
index cf9c1f77..242e6809 100644
--- a/Libraries/SPTarkov.Server.Core/Services/FenceService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/FenceService.cs
@@ -167,8 +167,8 @@ public class FenceService(
         var createAssort = new CreateFenceAssortsResult
         {
             SptItems = [],
-            BarterScheme = new Dictionary<string, List<List<BarterScheme>>>(),
-            LoyalLevelItems = new Dictionary<string, int>(),
+            BarterScheme = new Dictionary<MongoId, List<List<BarterScheme>>>(),
+            LoyalLevelItems = new Dictionary<MongoId, int>(),
         };
         createAssort.BarterScheme[root.Id] =
         [
@@ -186,7 +186,7 @@ public class FenceService(
     /// <param name="itemTpl"> The item tpl to calculate the fence price for </param>
     /// <param name="items"> The items (with its children) to calculate fence price for </param>
     /// <returns> Price of the item for Fence </returns>
-    public double? GetItemPrice(string itemTpl, List<Item> items)
+    public double? GetItemPrice(MongoId itemTpl, List<Item> items)
     {
         return itemHelper.IsOfBaseclass(itemTpl, BaseClasses.AMMO_BOX)
             ? GetAmmoBoxPrice(items) * traderConfig.Fence.ItemPriceMult
@@ -718,8 +718,8 @@ public class FenceService(
         return new TraderAssort
         {
             Items = [],
-            BarterScheme = new Dictionary<string, List<List<BarterScheme>>>(),
-            LoyalLevelItems = new Dictionary<string, int>(),
+            BarterScheme = new Dictionary<MongoId, List<List<BarterScheme>>>(),
+            LoyalLevelItems = new Dictionary<MongoId, int>(),
             NextResupply = GetNextFenceUpdateTimestamp(),
         };
     }
@@ -738,8 +738,8 @@ public class FenceService(
         var result = new CreateFenceAssortsResult
         {
             SptItems = [],
-            BarterScheme = new Dictionary<string, List<List<BarterScheme>>>(),
-            LoyalLevelItems = new Dictionary<string, int>(),
+            BarterScheme = new Dictionary<MongoId, List<List<BarterScheme>>>(),
+            LoyalLevelItems = new Dictionary<MongoId, int>(),
         };
 
         var baseFenceAssortClone = _cloner.Clone(databaseService.GetTrader(Traders.FENCE).Assort);
@@ -1025,7 +1025,7 @@ public class FenceService(
     /// <param name="itemRoot"> Root item having price adjusted </param>
     /// <param name="itemTemplate"> DB template of item </param>
     protected void AdjustItemPriceByQuality(
-        Dictionary<string, List<List<BarterScheme>>> barterSchemes,
+        Dictionary<MongoId, List<List<BarterScheme>>> barterSchemes,
         Item itemRoot,
         TemplateItem itemTemplate
     )
diff --git a/Libraries/SPTarkov.Server.Core/Services/Mod/CustomItemService.cs b/Libraries/SPTarkov.Server.Core/Services/Mod/CustomItemService.cs
index 8eaf9ec2..211d1fd4 100644
--- a/Libraries/SPTarkov.Server.Core/Services/Mod/CustomItemService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/Mod/CustomItemService.cs
@@ -48,7 +48,11 @@ public class CustomItemService(
         }
 
         // Clone existing item
-        var itemClone = cloner.Clone(tables.Templates.Items[newItemDetails.ItemTplToClone]);
+        tables.Templates.Items.TryGetValue(
+            newItemDetails.ItemTplToClone.Value,
+            out var itemToClone
+        );
+        var itemClone = cloner.Clone(itemToClone);
 
         // Update id and parentId of item
         itemClone.Id = newItemId;
diff --git a/Libraries/SPTarkov.Server.Core/Services/PaymentService.cs b/Libraries/SPTarkov.Server.Core/Services/PaymentService.cs
index ae8031de..1dc8893c 100644
--- a/Libraries/SPTarkov.Server.Core/Services/PaymentService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/PaymentService.cs
@@ -590,7 +590,7 @@ public class PaymentService(
     /// <param name="playerStashId"> Players stash ID </param>
     /// <returns> True if it's in inventory </returns>
     protected InventoryLocation GetItemLocation(
-        string itemId,
+        MongoId itemId,
         List<Item> inventoryItems,
         string playerStashId
     )
diff --git a/Libraries/SPTarkov.Server.Core/Services/RagfairLinkedItemService.cs b/Libraries/SPTarkov.Server.Core/Services/RagfairLinkedItemService.cs
index 4e879806..546cf54d 100644
--- a/Libraries/SPTarkov.Server.Core/Services/RagfairLinkedItemService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/RagfairLinkedItemService.cs
@@ -15,9 +15,9 @@ public class RagfairLinkedItemService(
     ISptLogger<RagfairLinkedItemService> logger
 )
 {
-    protected readonly Dictionary<string, HashSet<MongoId>> linkedItemsCache = new();
+    protected readonly Dictionary<MongoId, HashSet<MongoId>> linkedItemsCache = new();
 
-    public HashSet<MongoId> GetLinkedItems(string linkedSearchId)
+    public HashSet<MongoId> GetLinkedItems(MongoId linkedSearchId)
     {
         if (!linkedItemsCache.TryGetValue(linkedSearchId, out var set))
         {
@@ -35,7 +35,7 @@ public class RagfairLinkedItemService(
     /// </summary>
     /// <param name="itemTpl"> Item to get sub-items for </param>
     /// <returns> TemplateItem list </returns>
-    public List<TemplateItem> GetLinkedDbItems(string itemTpl)
+    public List<TemplateItem> GetLinkedDbItems(MongoId itemTpl)
     {
         var linkedItemsToWeaponTpls = GetLinkedItems(itemTpl);
         return linkedItemsToWeaponTpls.Aggregate(
diff --git a/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs b/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs
index e3090dea..f04d9336 100644
--- a/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs
@@ -347,7 +347,7 @@ public class RagfairPriceService(
     /// <returns>Adjusted price of item</returns>
     protected double AdjustUnreasonablePrice(
         UnreasonableModPrices unreasonableItemChange,
-        string itemTpl,
+        MongoId itemTpl,
         double price
     )
     {
@@ -402,7 +402,7 @@ public class RagfairPriceService(
     /// <param name="itemPrice">price of item</param>
     /// <param name="itemTpl">item template Id being checked</param>
     /// <returns>adjusted price value in roubles</returns>
-    protected double AdjustPriceIfBelowHandbook(double itemPrice, string itemTpl)
+    protected double AdjustPriceIfBelowHandbook(double itemPrice, MongoId itemTpl)
     {
         var itemHandbookPrice = GetStaticPriceForItem(itemTpl);
         var priceDifferencePercent = GetPriceDifference(itemHandbookPrice.Value, itemPrice);
@@ -507,7 +507,7 @@ public class RagfairPriceService(
     /// </summary>
     /// <param name="itemTpl">Item to get highest price of</param>
     /// <returns>rouble cost</returns>
-    protected double? GetHighestHandbookOrTraderPriceAsRouble(string itemTpl)
+    protected double? GetHighestHandbookOrTraderPriceAsRouble(MongoId itemTpl)
     {
         var price = GetStaticPriceForItem(itemTpl);
         var traderPrice = _traderHelper.GetHighestSellToTraderPrice(itemTpl);
diff --git a/Libraries/SPTarkov.Server.Core/Services/RepairService.cs b/Libraries/SPTarkov.Server.Core/Services/RepairService.cs
index f0185842..26ac3547 100644
--- a/Libraries/SPTarkov.Server.Core/Services/RepairService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/RepairService.cs
@@ -333,7 +333,7 @@ public class RepairService(
         string sessionId,
         PmcData pmcData,
         List<RepairKitsInfo> repairKits,
-        string itemToRepairId,
+        MongoId itemToRepairId,
         ItemEventRouterResponse output
     )
     {
diff --git a/Libraries/SPTarkov.Server.Core/Services/SeasonalEventService.cs b/Libraries/SPTarkov.Server.Core/Services/SeasonalEventService.cs
index 963bce7f..d2674bb7 100644
--- a/Libraries/SPTarkov.Server.Core/Services/SeasonalEventService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/SeasonalEventService.cs
@@ -28,7 +28,7 @@ public class SeasonalEventService(
 {
     private bool _christmasEventActive;
 
-    protected readonly HashSet<string> _christmasEventItems =
+    protected readonly HashSet<MongoId> _christmasEventItems =
     [
         ItemTpl.ARMOR_6B13_M_ASSAULT_ARMOR_CHRISTMAS_EDITION,
         ItemTpl.BACKPACK_SANTAS_BAG,
@@ -71,7 +71,7 @@ public class SeasonalEventService(
 
     private bool _halloweenEventActive;
 
-    protected readonly HashSet<string> _halloweenEventItems =
+    protected readonly HashSet<MongoId> _halloweenEventItems =
     [
         ItemTpl.HEADWEAR_JACKOLANTERN_TACTICAL_PUMPKIN_HELMET,
         ItemTpl.FACECOVER_FACELESS_MASK,
@@ -103,7 +103,7 @@ public class SeasonalEventService(
     ///     Get an array of christmas items found in bots inventories as loot
     /// </summary>
     /// <returns>array</returns>
-    public HashSet<string> GetChristmasEventItems()
+    public HashSet<MongoId> GetChristmasEventItems()
     {
         return _christmasEventItems;
     }
@@ -112,17 +112,17 @@ public class SeasonalEventService(
     ///     Get an array of halloween items found in bots inventories as loot
     /// </summary>
     /// <returns>array</returns>
-    public HashSet<string> GetHalloweenEventItems()
+    public HashSet<MongoId> GetHalloweenEventItems()
     {
         return _halloweenEventItems;
     }
 
-    public bool ItemIsChristmasRelated(string itemTpl)
+    public bool ItemIsChristmasRelated(MongoId itemTpl)
     {
         return _christmasEventItems.Contains(itemTpl);
     }
 
-    public bool ItemIsHalloweenRelated(string itemTpl)
+    public bool ItemIsHalloweenRelated(MongoId itemTpl)
     {
         return _halloweenEventItems.Contains(itemTpl);
     }
@@ -132,7 +132,7 @@ public class SeasonalEventService(
     /// </summary>
     /// <param name="itemTpl">item tpl to check for</param>
     /// <returns></returns>
-    public bool ItemIsSeasonalRelated(string itemTpl)
+    public bool ItemIsSeasonalRelated(MongoId itemTpl)
     {
         return _christmasEventItems.Contains(itemTpl) || _halloweenEventItems.Contains(itemTpl);
     }
@@ -157,12 +157,12 @@ public class SeasonalEventService(
         var items = new HashSet<MongoId>();
         if (!ChristmasEventEnabled())
         {
-            items.UnionWith(_christmasEventItems.ToMongoIds());
+            items.UnionWith(_christmasEventItems);
         }
 
         if (!HalloweenEventEnabled())
         {
-            items.UnionWith(_halloweenEventItems.ToMongoIds());
+            items.UnionWith(_halloweenEventItems);
         }
 
         return items;