I'm not trying to change the parts for a tool. You're supposed to be able to take a part, let's say a flint axe head, and then swap it out for another as if it were a material. So i should be able to take a flint axe head stick it in the part builder and change it to like a flint shovel head. I cannot do that.
So i just tried this pack out and although the "# Allows toolparts to be used as material in the Part Builder. Like, turn a Pick head into a Shovel head.! [default: true]" config in the iguana tinker tweaks main config is set to true i am still unable to change out tool parts for others in the part builder and I have no idea why.