i flew mine back in the day with a satio 91 and it would was a cap at 3d, except the harriers and elevators. Knife loops like it was cool but that planes rudder is close to a 1/4 scale size. Mine was on one elevator servo on the stick and wire. This could have had something to do with the elevators and harriers as the 1/2 never did quite match up, along with i build it with only one servo for the wings. you know the deal live and learn plus i was to new at kit building to kit bash it. the plans call for some upthrust about 2 degress. The plane did track well; however, the landing gear area is a very weak the way its built per the planes. Its just a butt joint piece of 1/4 ply. It will come of with the easiest of landing. talk with you soon .....