Thanks, you guys are both reading my mind. Funny, it has an 18x10 on it now but not a scrimitar. Reg xoar. The 20x6 was my next choice but dont want to load the engine too much. Then again I rarely use more than 1/3 throttle in flight. I suppose which ever one would make keeping even smooth airspeed on landing is the one that interests me most. Flown this one for a whole season now but as anyone with ww1 exp knows they can all be hairy!!!