I bought CF from Graphite girl also and it was good. But I prefer
Full Force RC and
Penguin RC. I got the 3 mm thick CF from Full Force and the 2.5 mm CF from Penguin RC for this project.
I have pdf files of the top chassis plate, the middle skid and the front skid doubler I made if anyone wants them. You just print them out and use them as templates. The drawings are pretty accurate and everything should line up nicely.
PM me your email if you want them.