I have a 2017 Legend V20 with 8' PP's. Mine are mounted to a Slidemaster manual plate. I pulled mine all the way up as high as they would go before tightening the bolts to the jackplate. So I have approx 4-6 inches that I can lower them with the normal way they adjust. My question is how you decide where to adjust. If I lower then I can get another 4-6 inches of anchoring but I am affraid they may be in the water when running. Is this a trial and error type of thing?