What Part swapping do you do with your Transformers? It can be anything from a Headswap to trading out limbs & everything in between. The only rule is no weapon swapping whatsoever, as almost every Transformer weapon ever made is either on a 5-millimeter peg or a C-clip. I'll start. I've swapped out my normal DOTM Deluxe Optimus Prime's arms with Lunarfire Prime's arms & swapped out DOTM Bumblebee's head with Nitro Bumblebee's more accurate (in my opinion) head.