Ben get hydraulic trim tabs or electrically operated blades both are adjustable to the conditions and won't catch you out in a following sea (if you remember to retract) Get a set that automatically retract when you turn off the ignition, they may all do that now but never used to which led to damage on Awol when she was retrieved on drystack. The fixed type of trim tabs are not adjustable during a day out and awkward to retract in a larger boat. If your prop needs repitching I believe Darglow engineering at Holton Heath can do this. 1" of pitch equates to roughly 200rpm failing them send it to Clements Marine