I have a 2021 B52 Alpha 575 Beast. I run it 100% full ballast, with additional weight of 200lb in the nose 150lb midship on each side, and 50 lb in each rear locker. 11-11.3mph, no trim (sometimes a little tab on goffy side to flatten the wave), no cleanup required even with 2 people. Typically don't have more than 6-8 people onboard.
It’ll probably be May before we really get to surf. Need to finish engine brake in, plus water still a little chilly in April and no wetsuits yet. Did you ever go over to Pull? They’ll be happy to do on water demo. Looks like someone else with a Supra faded it in on something from them. Boat should get delivered soon, weather dependent.