I spent some time today really stiffining up my chassis. I countersunk all screws on my top plate accept the 4 that connect to the diff cases. On those screws I used a very long countersunk screw with the HPI countersunk aluminum washers to really clamp down on the carbon fiber. I also used loctite threadlocker to hold in all chassis and top plate screws. I was thinking about having a special chassis made but, the chasis feels much, much stiffer. You can hardly twist the chasis by hand!