oops....screwed up again,....I'd forgotten,...I actually mounted an OS 46FX to the plane, took it off my ultra stik...as the pipe that came with the Tower Hobbies engine was too long to fit in the space provided on the bottom side of the fuselage, and I couldn't get it to run right with the muffler from the OS on it,..regardless, Kyosho screwed up big time in their instructions, do NOT go by them. Still haven't made repairs to this plane, as I've been busy working on others. The guy I had maiden flight the plane is an excellant pilot and was able to put the plane down with only minimal damage and is easily repairable.Please let me know what your solution is.