Before I experiment more i thought id get some recomendations...my 195 with 115 pro xs is mounted in the second hole from what i can tell 4.25ptp. My 19p mw prop runs 46-50 mph at 6300 rpm depending on load but between trimmed down and full up I get a spot where the prop loses bite and the motor shakes. Running up a river I have to trim through this spot every corner....or I can trim to the highest point and back way off the throttle so I don't over rev and take the corner just fine ... My fastest speed with good rooster tail is one bump on the trim down from losing bite and shaking....i tried a spitfire x7 for more bite and it did the same if not worse which leads me to motor height but not sure if i should go up or down