Thanks for the great idea.... I have the aluminum stock and was having trouble with the design, this will work for mine as well with some small changes.. I wont replace the steering servo, fuel tank mount and I will put the throttle servo on top... Don't think you have too much time on your hands, just have creative uses for that time.... This will save me a huge amount of time... I was looking for a way to strenghten the bottom chassis and never looked at an upper chassis.... THANK YOU