Currently having some trouble getting some speed out of my 2012 721. Running a 2016 Mercury 250 Pro XS 2 stroke turning a new fury 25P at 5700 rpm, dual 10 foot talons, 10” z-lock manual Jackplate. Current prop to pad is 2.5”. Also have 1 X2 AGM and 3 Lead acid interstate batteries in the back. Have tried about every combination of weight throughout the boat and still have trouble hitting 70 mph. Any advice is appreciated. Thanks I’m advance.