Sorry guys, But I do not think that is a Piper J3, It looks like one! I have a Goldberg J3 full wing. I have a 60 OS FS on it , it does tail slides, knife edge, And will hover for a short time(need more motor) It is about 14 years old and cant bring myself to re-powering it. I do believe that the right pilot could make a J3 do allot! It would still have problems with some maneuvers with that high wing and the flat bottom.