Sean, the C/F is real and is a sanwich of top and bottom C/F with plywood in between. It is very thin and lightweight, but very strong. Total thickness of the boards is about 2.5mm.

Tom Cook uses loads of C/F throughout the Firebird fuse, gear mounts, and radio and servo mounting boards. While I have not yet flown the FB, all ground range checks are excellent in all 4 quadrants, despite the use of C/F.