[Kamen Rider Die]

Just checking out my kits, and, yeah, Build is a problem. Everyone else has the belt/driver go on as a seperate piece, so it can be replaced, while Build's driver connector is molded to his groin piece. You'd have to swap out the entire groin, rather than just pop off the torso and swap in the new belt connector. Here's a not-great comparison between Build and Faiz:



All of the black plastic on Build's groin is one piece. (EDIT: Pulled it apart, and it's two pieces, front and back. Sorry!) Blue sticker on his right side, red sticker on his left side, yellow sticker for the belt. Every other kit (IIRC) has the belt go on above the groin.