That's just awesome. I love the use of RTS Prime for Motormaster. Are you swapping the heads from one mode to the other?
If you're unhappy with leadfoot as Dragstrip may I suggest machine wars/robot masters mirage/ RIS Skid-z. done right you can even get an elbow from him.
I especially like how this is made from Optimus Prime & Windcharger ... you know just like on that G1 episode heh
you really have something great going on here. i dont know if you already have it planned out or if you're open to suggestions, but if you are, im going to speak my peace. i think motormaster would benefit greatly from having a magnet placed on the altmode roof so you can just pop his head on , and i would also find a way to alter the arm figures in such a way that menasor gets elbows. but like i said, these are just my ideas, and im sure even if you dont do them he's gonna look amazing anyways. im not gonna say you have to do anything, because this set alone is like a million times more than anything i have done in the past year. tl;dr great work!