I just spent the morning with my 750s for the first time. I'm 230 and using a CWB Ride. Surf side full, front full (stock) and I couldn't throw the rope in and keep going. We are running at 11.2 with the plate at about 1/4 down. Filled up both factory bags, put one in the bow and the other on the seat (surf side) and I could throw the rope in but the wake was short. I will put my old Fay sac in the bow next time and use the two smaller bags in the back to move around. A little hummed that I can't just use the ballist system but then again it wasn't made for it. Regarding the 750- don't under estimate the power of hydraulic. If the bag is in the compartment wrong and the empty hose gets kinked, the high volume, low pressure these bags can build will break a lot of stuff. I relocated my empty pumps to the front of the bags (this is were the bottom port is on the bags) and made a super short connection from it to the bag, decreasing the potential of problems and spending up the empty times significantly. When the bag is full the pressure back feeds brought the empty plumbing out the thru the hull fixture.
2003 Supra Launch 22SSV
1986 Ski Natique 2001