Basic Item System with stacking functionality - Please Critique!

I will not be replying to this thread for awhile, as I want to finish my inventory system from start to finish. Anyone who wants to make use of this system and write tutorials is more than welcome to do so, just please give credit where it is due. Once my whole system is done, I plan to record a full youtube series of videos explaining it from start to finish and releasing it through the market place since it’s something many people will want.

I had originally actually wanted feedback for this system and it turned into a tutorial which really wasn’t my goal at the time of the post. I hope it helps people along and if any serious questions come up you can PM me but I am a busy person so it may take time to reply.

-Haka