Well, the 4600 on ~17v is insane enough for me! It's making me think seriously about getting the proper tires, a 4s lipo pack, and then challenging just about any Jato out there. How the heck do you keep the tires from ballooning? I know the duct tape thing, but there's no way it could handle that kind of centrifugal force. I almost need a solid tire, or tires that have steel belts in them.