YOU HAVE TO USE METAL GEAR SERVOS! i had 9202's on mine and went in to a KE spin and pulled out and the ailorons were fluttering so bad the plane shook. It wrecked the wing but I fixed it. A saito 120 is awesome on this plane. Hovers at 1/3 throttle with 15% and it weighs 8 1/2 pounds. Now im am using 5645 hitecs. This is an awesome plane.