Interested to hear how the flap/aileron mods work out. My dad has one of these and its a real floater. Powers it with an OS .40LA which seems plenty. We had to shim the rear of the wing with popsicle sticks to keep it from climbing at anything over 1/4 throttle. You are putting a .75 on yours? Geez. Would think that would tear it apart! [X(]