thanks guys.. this is an OMP Edge V3 Profile so the alpha attitude test is a great idea... what prop are you using on your profile w/the 55AX and do you happen to remember what your high and idle RPMs are?... I used a Great Planes tach. to get mine.. my idle is at about 2400 and will sit there all day it seems and the high is at 10,400. I think I should back off a click or two on the high..