diff --git a/src/main/java/com/simibubi/create/content/contraptions/MountedStorageManager.java b/src/main/java/com/simibubi/create/content/contraptions/MountedStorageManager.java
index 1ce9554475..530ff6f554 100644
--- a/src/main/java/com/simibubi/create/content/contraptions/MountedStorageManager.java
+++ b/src/main/java/com/simibubi/create/content/contraptions/MountedStorageManager.java
@@ -97,9 +97,7 @@ public void initialize() {
 
 		this.allItemStorages = ImmutableMap.copyOf(this.itemsBuilder);
 
-		this.items = new MountedItemStorageWrapper(subMap(this.allItemStorages, this::isExposed));
-
-		this.allItems = this.items;
+        this.initializeManagerItems(new MountedItemStorageWrapper(subMap(this.allItemStorages, this::isExposed)));
 		this.itemsBuilder = null;
 
 		ImmutableMap<BlockPos, MountedItemStorage> fuelMap = subMap(this.allItemStorages, this::canUseForFuel);
@@ -115,6 +113,11 @@ public void initialize() {
 		this.syncedFluidsBuilder = null;
 	}
 
+    protected void initializeManagerItems(MountedItemStorageWrapper items) {
+        this.items = items;
+        this.allItems = this.items;
+    }
+
 	private boolean isExposed(MountedItemStorage storage) {
 		return !AllMountedItemStorageTypeTags.INTERNAL.matches(storage);
 	}
diff --git a/src/main/java/com/simibubi/create/content/contraptions/minecart/TrainCargoManager.java b/src/main/java/com/simibubi/create/content/contraptions/minecart/TrainCargoManager.java
index 33a9fadce8..3b00610bf8 100644
--- a/src/main/java/com/simibubi/create/content/contraptions/minecart/TrainCargoManager.java
+++ b/src/main/java/com/simibubi/create/content/contraptions/minecart/TrainCargoManager.java
@@ -27,7 +27,7 @@ public TrainCargoManager() {
 	@Override
 	public void initialize() {
 		super.initialize();
-		this.items = new CargoInvWrapper(this.items);
+        this.initializeManagerItems(new CargoInvWrapper(this.items));
 		if (this.fuelItems != null) {
 			this.fuelItems = new CargoInvWrapper(this.fuelItems);
 		}