We have a 2021 S21, Bi-toon, no strakes, with a 115 VMAX SHO, full fuel, 2 adults, top stowed, 15 pitch, 4 blade Hustler aluminum propeller, 29 mph @5850 rpm, top up, 28 mph, same load. I don't know how the RL compares to SL from a weight perspective. I'd say you have yours dialed in pretty well.