Yeah, I am not really sure what I am going to do yet. I think for now I will just stick with the roto start. I have just picked up a used mayhem pro along with a starter box, otherwise I would not even be worrying about it. I have bought a new sportwerks .26 with carb, and the clutchbell, flywheel, shoes, roto start backplate, etc and it also include the RTR motor mounts so I will be fine for now. I am just trying to figure out since I already have the box if I should take advantage of it since I will be racing and the lower CG would help. Thanks