i have a 21 ft.1997 maxum cuddy with a 5.7 4 barrell.i have a 14.25x21 prop on it now.top speed 40mph at 3400 rpm.you can pull the throttle back almost 1/2 way without any speed loss at top speed.trimming the drive will gain about 300 rpm and about 3 mph.cant trim much or it loses grip.is there...