@DooSPX tell your buddy with the 2010 Moomba to,change his prop. I switched to an ACME 3 blade (the one they recommended and I can get the exact model if you need it).
I always wondered why my Outback didn't feel as good as the other ski boats. Then I changed props. The hole shot improved dramatically and the top speed improved. In fact, when I redid the Stargazer baselines, the RPM was about 200 lower.
Maybe this is because the ACME props have a different design with much more surface area. Regardless, the improvement was dramatic.