JCInventory, Grid based jigsaw Inventory for your projects

Has anybody integrated this system as the master inventory for other BP items (i.e. generic shooter weapons). Trying to make it work but honestly confused. Should I re-parent the Other BP (i.e. generic shooter weapon items) under JCInventoryItem? How do you handle the concept of duplicate meshes etc. I assume there is some form of simple way that I am missing.