diff --git a/build.gradle b/build.gradle
index 7bdc078e..08871f0b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,7 +13,7 @@ buildscript {
 apply plugin: 'net.minecraftforge.gradle.forge'
 
 
-version = "1.11-1.4.2" 
+version = "1.11-1.4.3" 
 group= "com.azanor.baubles" 
 archivesBaseName = "Baubles"
 
diff --git a/src/main/java/baubles/api/BaublesApi.java b/src/main/java/baubles/api/BaublesApi.java
index 5e14513d..6f6329ca 100644
--- a/src/main/java/baubles/api/BaublesApi.java
+++ b/src/main/java/baubles/api/BaublesApi.java
@@ -11,20 +11,26 @@
  */
 public class BaublesApi 
 {	
+	
 	/**
 	 * Retrieves the baubles inventory capability handler for the supplied player
 	 */
 	public static IBaublesItemHandler getBaublesHandler(EntityPlayer player)
 	{
-		return player.getCapability(BaublesCapabilities.CAPABILITY_BAUBLES, null);
-	}
-		
+		IBaublesItemHandler handler = player.getCapability(BaublesCapabilities.CAPABILITY_BAUBLES, null);
+		handler.setPlayer(player);
+		return handler;
+	}	
+
 	/**
 	 * Retrieves the baubles capability handler wrapped as a IInventory for the supplied player
 	 */
 	@Deprecated
 	public static IInventory getBaubles(EntityPlayer player)
 	{
-		return new BaublesInventoryWrapper(player.getCapability(BaublesCapabilities.CAPABILITY_BAUBLES, null), player);
+		IBaublesItemHandler handler = player.getCapability(BaublesCapabilities.CAPABILITY_BAUBLES, null);
+		handler.setPlayer(player);
+		return new BaublesInventoryWrapper(handler, player);
 	}
+	
 }
diff --git a/src/main/java/baubles/api/cap/BaublesContainer.java b/src/main/java/baubles/api/cap/BaublesContainer.java
index debe1f39..948e210e 100644
--- a/src/main/java/baubles/api/cap/BaublesContainer.java
+++ b/src/main/java/baubles/api/cap/BaublesContainer.java
@@ -9,7 +9,8 @@ public class BaublesContainer extends ItemStackHandler implements IBaublesItemHa
 
 	private final static int BAUBLE_SLOTS = 7;
 	private boolean[] changed = new boolean[BAUBLE_SLOTS];
-	private boolean blockEvents=false;
+	private boolean blockEvents=false;	
+	private EntityLivingBase player;
 	
 	public BaublesContainer()
     {
@@ -37,11 +38,23 @@ public void setSize(int size)
 	public boolean isItemValidForSlot(int slot, ItemStack stack, EntityLivingBase player) {
 		if (stack==null || stack.isEmpty() || !(stack.getItem() instanceof IBauble) ||
 				!((IBauble) stack.getItem()).canEquip(stack, player))
-			return false;
-		
+			return false;		
 		return ((IBauble) stack.getItem()).getBaubleType(stack).hasSlot(slot);
 	}
 	
+	@Override
+	public void setStackInSlot(int slot, ItemStack stack) {
+		if (stack==null || stack.isEmpty() || this.isItemValidForSlot(slot, stack, player)) {
+			super.setStackInSlot(slot, stack);
+		}
+	}
+
+	@Override
+	public ItemStack insertItem(int slot, ItemStack stack, boolean simulate) {
+		if (!this.isItemValidForSlot(slot, stack, player)) return stack;
+		return super.insertItem(slot, stack, simulate);
+	}
+	
 	@Override
 	public boolean isEventBlocked() {
 		return blockEvents;
@@ -73,5 +86,10 @@ public void setChanged(int slot, boolean change) {
 		}
 		this.changed[slot] = change;
 	}
+
+	@Override
+	public void setPlayer(EntityLivingBase player) {
+		this.player=player;
+	}
 	
 }
diff --git a/src/main/java/baubles/api/cap/IBaublesItemHandler.java b/src/main/java/baubles/api/cap/IBaublesItemHandler.java
index d7ffb491..ca4a53f3 100644
--- a/src/main/java/baubles/api/cap/IBaublesItemHandler.java
+++ b/src/main/java/baubles/api/cap/IBaublesItemHandler.java
@@ -1,6 +1,7 @@
 package baubles.api.cap;
 
 import net.minecraft.entity.EntityLivingBase;
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 import net.minecraftforge.items.IItemHandlerModifiable;
 
@@ -21,4 +22,6 @@ public interface IBaublesItemHandler extends IItemHandlerModifiable {
 	 */
 	boolean isChanged(int slot);
 	void setChanged(int slot, boolean changed);
+
+	public void setPlayer(EntityLivingBase player);
 }
diff --git a/src/main/java/baubles/api/package-info.java b/src/main/java/baubles/api/package-info.java
index 15e1dc94..0052d2ab 100644
--- a/src/main/java/baubles/api/package-info.java
+++ b/src/main/java/baubles/api/package-info.java
@@ -1,4 +1,4 @@
-@API(owner = "Baubles", apiVersion = "1.4.0.1", provides = "Baubles|API")
+@API(owner = "Baubles", apiVersion = "1.4.0.2", provides = "Baubles|API")
 package baubles.api;
 
 import net.minecraftforge.fml.common.API;
diff --git a/src/main/java/baubles/common/Baubles.java b/src/main/java/baubles/common/Baubles.java
index 38709564..de354af6 100644
--- a/src/main/java/baubles/common/Baubles.java
+++ b/src/main/java/baubles/common/Baubles.java
@@ -33,7 +33,7 @@ public class Baubles {
 	
 	public static final String MODID = "baubles";
 	public static final String MODNAME = "Baubles";
-	public static final String VERSION = "1.4.2";
+	public static final String VERSION = "1.4.3";
 
 	@SidedProxy(clientSide = "baubles.client.ClientProxy", serverSide = "baubles.common.CommonProxy")
 	public static CommonProxy proxy;
diff --git a/src/main/java/baubles/common/container/SlotBauble.java b/src/main/java/baubles/common/container/SlotBauble.java
index 0a47a5b6..3315ca2b 100644
--- a/src/main/java/baubles/common/container/SlotBauble.java
+++ b/src/main/java/baubles/common/container/SlotBauble.java
@@ -25,10 +25,7 @@ public SlotBauble(EntityPlayer player, IBaublesItemHandler itemHandler, int slot
     @Override
     public boolean isItemValid(ItemStack stack)
     {
-    	return stack!=null && !stack.isEmpty() && stack.getItem() !=null &&
-        	   stack.getItem() instanceof IBauble &&
-        	   ((IBauble)stack.getItem()).getBaubleType(stack).hasSlot(baubleSlot) &&
-        	   ((IBauble)stack.getItem()).canEquip(stack, player);
+    	return ((IBaublesItemHandler)getItemHandler()).isItemValidForSlot(baubleSlot, stack, player);
     }
 
 	@Override
diff --git a/src/main/resources/changelog.txt b/src/main/resources/changelog.txt
index a7b21921..2e5a8dda 100644
--- a/src/main/resources/changelog.txt
+++ b/src/main/resources/changelog.txt
@@ -1,3 +1,6 @@
+1.4.3
+- added player references to capabilities container and added checks for item validity.
+
 1.4.2
 - fix for ticking entity crash