I have a question regaurding motor setup.<br />I have a 1984 Boston Whaler 15' sport w/ 1984 70 HP Johnson I have it set up on a manual jack plate with about 5" of setback and I have recently aquired a hydraulic jack plate with about 5" of setback also my question is if I bolt the hydraulic jack plate to the boat and I the bolted the manual jack plate to the hydraulic jack plate that would give me 10" of setback would this setup help or hurt performance.....Heath 
