I have an 1820 Robalo CC. When I first got the boat a had a terrible time getting up on plane and controlling porposing. I added a hyrdafoil to the top of the cavitation plate which mada a remarkable difference in performance and fuel consumption. Last year I invested in a pair of Bennet Sport tabs. My opinion.......I should have invested in tabs sooner. I get a much better hole-shot, the ride is smoother, drier, and I spend fewer $$ on gas.