You could push on. You know you are putting retracts in. you just cant put the skins on. I know i will get booed and hissed at for this but forget the flaps and you could put the retract servo in the spot where the flap servo goes. I thought about it but for 150.00 i just went with the robarts. You gotta check out this guys spit (saramos) He has his on off switch hidden and im thinking about stealing that get up.