Let's start ballast set ups here since it has to do with wakesurfing tips..   2005 Centurion Avalanche C4 Storm3 bling pkg. Ballast upgrade from factory Port surf.... Rear port locker has a 1100 Fly High sac (completely fills locker) Added a 580 fly high sac under port side seat (400-450 I guess it holds without pushing the seat up) 250 factory center tank Added a 650 fly high bow sac under seats (will fill full) Plate just down a hair to clean spray 11.8 to 12 mph Rope is all the way out to show length of wave with actual push there. 2 -200 pound observers, 175 pound driver.