Stacking Wes Bunn Inventory

I followed the Wes Bunn inventory system for dragging and dropping items. The system its self works how it was intended to be. I was just wondering if it is possible to add to this system to allow item stacking.

These 4 images are the way the items are picked up and added to the inventory. If you need more images of functions or different parts like UMG just post and ill add them.

Hello man,
I really need to know what’s is the MasterPickup Blueprint on the third image cause i can’t do my inventory without this info. Thanks a lot.