[suicideneil]

^That. Traxxas does use very thin polycarbonate for it's shells, once you get up some kind of speed it'll be flexing and deforming all over the place due to the air pushing down on it = unstable. Chassis and shell flex is one of the issues Mr Case had initially, now he runs a CF chassis and a rather thick shell ( not sure if it's CF, GRP or just really thick lexan )...