Damn i have broken all 3 diff cups that i've replaced, and the last two in the same day which was yesterday. I have been running the stocks as i go along. they're just as weak as the upgrades. COME ON REDCAT WE WOULD RATTHER PAY A 100 BUCKS MORE FOR THE CAR THAN GO TO THE PARK AND RUN HALF THROTTLE ALL DAMN DAY WITH OUR TOES AND FINGERS CROSSED HOPPING NOT TO BREAK A PART. HARDEN THE DIFFS AND QUIT FOCUSING ON MAKING A HPI BAJA CLONE KING MOTORS ALL READY SELLS ONE. and yess the upgrades are garbage.