[ngreen]

If you are burning rubber going straight and tripping breakers that way it most likely is the wrong gearing. What motors were you using? If it was the drill motors are you using the transmission in high or low gear? What kind of reduction do you have either from the the CIMs or from the drill motors? What size of wheels are you using?

From the information you have posted I see it as overgearing the motors. You'll have to provide more information before I could tell you.