Hey, just wanted to share results of upgrade I think it is only on 2006 where some are mechanical but can be upgraded. I really only surf and found with mechanical it was inconsistent sometimes it would hold perfect other times it would vary 1.5 mph. I would have to listen to the motor and ready for it to speed up or down and adjust board speed. Pp dbw easy install and no adjustments now holds to .2 mph amazing results. Now I can concentrate on improving my skills not on if the boat is going to change speed on me. Anyway highly recommend if you have the option.