I have a 3 star tempered caliber recipe and all the materials, but i still can't make one. What goes in the special/caliber slot?!
I guessed I needed a 2 star caliber to drop in there and it would work like a weapon upgrade, but that doesn't work either!
Do i need one that isn't already bound to me......that would be annoying since I only bound it to me whilst I refound the materials i used to bulid it!
You can't be wielding the equipment you are trying to upgrade. Unequip it first, you silly goose.