hey guys,the fk05 chassis will be 3mm c/f.so will the towers and other components.i can tell you,there is going to be alot of things changed on this car on the final production.after making the chassis more rigid,it amplified the problems.now its time to fix them.i should have a new prototype this coming week.its going to be changed quite a bit from the stock chassis but i assure you,it will be better.