Before i added the new main Chassi I put it in A LARGE VICE AND BENT THE SIDES UP A LITTLE MORE MAKING THE PLASTIC PIECES FIT ON WEIRD BUT WORTH THE TIME THAT INCREASED THE STRENGTH OF THE ENTIRE TRUCK. I HAVE BEEN IN SOME PRETTY NARLY SPILLS AND THE CHASSI IS STILL STRAIGHT. IN MY OPINION THIS IS A MUST DO UPGRADE FOR ANY REDCAT SOFT FRONT CHASSI BIGGY OR TRUCK AND MY DIFF UPGRADE