I built all my trophy flux buggy stuff on to a D8 chassis. The original cheap ally chassis was twisted after a few months racing. It wasn't too difficult, just an extra hole for the motor mount, 4 tapped holes for the battery tray. Also the steering posts for the trophy were slightly wider apart, but I slotted the holes out. The holes for the side guards almost line up so a couple more holes, and everything else fitted fine.