I just picked up a 70" 3 blade Powerfin prop that will work on the Kitfox with a 912 engine. Is anyone else running one of these and if so what are your thoughts on the Powerfin? I did have one years ago for a short time on an Avid with 582, and it didn't seem to be any better than the IVO, and harder to adjust so I went back to the IVO. JImChuk