Hi great build, but I'm thinking you may run ito trouble setting the blind nuts for the engine if you do not have the engine. seems to me this was one of the first steps, but may be you can do it later, be sure and check this step. mounted a 46 on mine it had more then enough power, but built very tail heavy when balanced according to GP plans, had better luck balancing right on main spar, all in all a super flyer