I think I fried my MGM

[cart213]

A 10L on 5s lipos should be spinning at 40~45,000 rpm. That's not unreasonably high, and I can't believe that it could fry a 160 amp controller, assuming that everything else on the buggy is operating correctly. If you've broken 3 very capable controllers on that buggy, then something strange is going on. How hot did the MGM get when it cut out? Was it hotter than it normally is? Were you running in different conditions than normal? Have you checked your drivetrain to see if it spins smoothly? You should go over every inch of your buggy to make sure nothing is abnormal.