I would move some of your lead forward into the bow. 10 degrees of pitch could be lowering the push. If weight is concentrated towards the stern, the bow becomes more buoyant and won’t displace as much water. Goal is to keep enough of the bow and stern in the water and achieve pitch and roll numbers.
Center plate less than 20. Make sure to burp your bags and top them off after every run. When you pitch >10 degrees you could be losing volume from the bags. Increase speed to 11.2-12.1 dependent on rider ability.
Which side are you surfing? Reg or goofy?
What degree of roll are you achieving for surf side? You’ll want to move lead and people there.
If running goofy, you’ll need more roll to counter prop rotation and cavitation.
Making my new SA build come true!!!
2020 SA 450 Wife calls it White Cloud. Said it makes her feel "Classy"
2017 Sanger V215sx. We call it Viagra because it's the little blue pill that gets everyone up (Sold)