If you see the link.. it says it all no one uses Hitech servos except 1 or 2 of the total pilots so i wont recommend these servos as they are good for Giant scale applications not for precession aerobatics like F3A. There is no cheap way to compromise on servos selections when it comes to F3A.

http://nsrca.us/documents/nats/2008_...tion_Sheet.pdf