Fired up my new 120AX last Saturday, Here are the results, APC 16-8 at 9200rpm and this was at the transition point from 4 cycling to 2 cycling, probably looks like the 17-8 might be the prop to use to get to the 9000 number. As a owner of two 1.08's, my advice to everyone is trash the 1.08 and get the 1.20, I was amazed at the size difference, the 1.20 looks tiny compared to the 1.08, in spite of the added weight. I could have put this on a plane after about 2 8oz tanks, it was running so good. Finally an engine maker figures out the pitts problem and deliver's with the 90 degree adaptor, how long will it take to supply them for the rest of their engines, specifically the 1.60.