John, how were the temps on the 5700? I would think that motor on such a light car wouldn't load the motor enough, but plan to use a 4600 on a CRT.5 and was wondering how hot it ran.
I don't have a temp gun but I did the 5 second finger test several times during the runs and didn't have an issue. I let the car sit outside about five mins between packs and the motor never really got too hot to touch. The Battery pack did get pretty warm but I have LiPo's on the way. Some of the motor cooling might have to do with the design of the hopper. The body is completly open and the motor is pretty much hanging out in the breeze.