Well the SK 50 ran like a champ. It would idle for at least a minute and not hesitate on transition. Everyone at the field was quite interested in the new motor. We spent a lot of time on the bench just checking everything out and tweaking the carb. What was interesting is we set it to be a bit rich with a tach, and then held the plane nose high, and it leaned out real quick. We added 3 more clicks and that did the trick. 6 tanks thru the engine now and I am quite happy. No deadsticks, a smooth idle at about 2600 RPM. Hope to go lower as it breaks in. I think it has as much or more power than the 46AX - at 1/2 the cost. The plane seems faster but the mind can play tricks on you when you want all things to go well!!!! I wish I had 2 identical planes to compare the SK 50 VS the 46AX. Bottom line.... best $60.00 bucks I have spent in a while!