Except for the fact that in many cases the Gadget slots are Locked. So, naturally, you will need to Unlock each one. You do this through the mystical process called Tinkering. Before you hardcore warriors go off screaming into the night, this is a fairly simple procedure that doesn’t require a lot of thought or advance planning. You’ll need to acquire a Tinkering Kit, one specific to the item you wish to unlock. You can typically find the lower level Tinkering Kits at vendors in towns and occasionally as loot in the wastelands.