I actually was pretty excited that OS may have finally delivered (to someone) what I felt I was promised. When they lowered the prop recommendations, I e-mailed them a very angry letter about the change. If I had read a 13 inch prop recommendation in the first place, I would have never owned a 91FX. Just for laughs, go to the OS website and compare prop recommendations for the 91FX and the 65LA. To me that's the funniest thing I've ever seen. Spiff, I have to say thank you for rechecking your data and clearing it up. There are those here who would have not done so. Now build that darn mousse can and lets se what it can do. Maybe you can get some real power from the 91.