So I think what I need to do is find to find out if the chest has been made into a large chest and if it returns true then create another opengui with a different ID. then write up another gui event in the handler for the large chest gui, but I'm not sure if what im saying will work, and also I would have no idea how to write this. I've tried writing it a bunch of different ways but it never works. I'm very confused. I'd appreciate if someone could tell me what I need to write in order to get this working. Thanks!