So erm yea, this has branched out into item crafting too.
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Craftable Items List Holds all the things you can craft in the game. Its set on the player controller currently. The crafting menu widget will look at this, and your inventory and compare what items are in it, and how much you have. if you have enough the button to craft the item will be unlocked.
Its also automated to the point you will not have to update blueprint nodes when adding each new crafting item unlike a lot of other “crafting” and inventory tutorials i’ve seen out there. Just add what required items and amount to each item, and what can be crafted to the crafting list and done 