diff --git a/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityActivator.java b/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityActivator.java
index cd9e537e..2dc030eb 100644
--- a/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityActivator.java
+++ b/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityActivator.java
@@ -3,6 +3,9 @@
 import net.minecraft.core.BlockPos;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientGamePacketListener;
+import net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.world.MenuProvider;
 import net.minecraft.world.entity.player.Inventory;
@@ -52,6 +55,17 @@ public ArrayList<ActivatorOption> getOptions()
         return options;
     }
 
+    @org.jetbrains.annotations.Nullable
+    @Override
+    public Packet<ClientGamePacketListener> getUpdatePacket() {
+        return ClientboundBlockEntityDataPacket.create(this);
+    }
+
+    @Override
+    public CompoundTag getUpdateTag() {
+        return saveWithoutMetadata();
+    }
+
     @Override
     public void load(@NotNull CompoundTag compoundTag)
     {
@@ -82,6 +96,7 @@ public void receivePacket(final int id, final byte[] data, @org.jetbrains.annota
             if (optionId >= 0 && optionId < options.size())
             {
                 options.get(optionId).changeOption(leftClick);
+                setChanged();
             }
         }
     }
diff --git a/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityCargo.java b/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityCargo.java
index a9492b1c..37ae94d3 100644
--- a/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityCargo.java
+++ b/src/main/java/vswe/stevescarts/blocks/tileentities/TileEntityCargo.java
@@ -149,6 +149,7 @@ else if (this.target[id] < 0)
             {
                 receiveClickData(packetid, id, dif);
             }
+            setChanged();
         }
     }
 
@@ -423,9 +424,9 @@ public TransferManager getCurrentTransferForSlots()
         BlockState state = this.getBlockState();
         if (!(state.getBlock() instanceof BlockCargoManager))
         {
-            return new InvWrapper(this);
+            return new ItemStackHandler(0);
         }
-        return new ItemStackHandler(0);
+        return new InvWrapper(this);
     }
 
     @Override
diff --git a/src/main/java/vswe/stevescarts/modules/addons/ModuleCrafter.java b/src/main/java/vswe/stevescarts/modules/addons/ModuleCrafter.java
index 224e240b..d6ce580f 100644
--- a/src/main/java/vswe/stevescarts/modules/addons/ModuleCrafter.java
+++ b/src/main/java/vswe/stevescarts/modules/addons/ModuleCrafter.java
@@ -91,7 +91,7 @@ public void update()
                                 }
                             }
                         }
-                        if (valid)
+                        if (valid && getValidSlot() != null)
                         {
                             getCart().addItemToChest(result, getValidSlot(), null);
                             if (result.getCount() > 0)
diff --git a/src/main/java/vswe/stevescarts/modules/addons/ModuleRecipe.java b/src/main/java/vswe/stevescarts/modules/addons/ModuleRecipe.java
index 34bd4f4a..f098e5ee 100644
--- a/src/main/java/vswe/stevescarts/modules/addons/ModuleRecipe.java
+++ b/src/main/java/vswe/stevescarts/modules/addons/ModuleRecipe.java
@@ -381,24 +381,19 @@ protected void prepareLists()
             allTheSlots.clear();
             outputSlots.clear();
             final Class validSlot = getValidSlot();
-            for (final ModuleBase module2 : getCart().getModules())
-            {
-                if (module2.getSlots() != null)
-                {
-                    for (final SlotStevesCarts slot2 : module2.getSlots())
-                    {
-                        if (validSlot.isInstance(slot2))
-                        {
-                            outputSlots.add(slot2);
-                            allTheSlots.add(slot2);
-                        }
-                        else
-                        {
-                            if (!(slot2 instanceof SlotChest))
-                            {
-                                continue;
+            if (validSlot != null) {
+                for (final ModuleBase module2 : getCart().getModules()) {
+                    if (module2.getSlots() != null) {
+                        for (final SlotStevesCarts slot2 : module2.getSlots()) {
+                            if (validSlot.isInstance(slot2)) {
+                                outputSlots.add(slot2);
+                                allTheSlots.add(slot2);
+                            } else {
+                                if (!(slot2 instanceof SlotChest)) {
+                                    continue;
+                                }
+                                allTheSlots.add(slot2);
                             }
-                            allTheSlots.add(slot2);
                         }
                     }
                 }
diff --git a/src/main/java/vswe/stevescarts/modules/addons/ModuleSmelter.java b/src/main/java/vswe/stevescarts/modules/addons/ModuleSmelter.java
index 9ab828a9..ae5f7551 100644
--- a/src/main/java/vswe/stevescarts/modules/addons/ModuleSmelter.java
+++ b/src/main/java/vswe/stevescarts/modules/addons/ModuleSmelter.java
@@ -58,7 +58,7 @@ public void update()
                 {
                     result = result.copy();
                 }
-                if (!result.isEmpty() && getCart().getModules() != null)
+                if (!result.isEmpty() && getCart().getModules() != null && getValidSlot() != null)
                 {
                     prepareLists();
                     if (canCraftMoreOfResult(result))