Not sure if this will help. My 2020 Mojo with the 400 has a top speed of 38mph with the stock OJ 15.5” Dia X 16.5” Pitch. I run 4700 lbs of total ballast and I am switching to a different prop as this prop has too much pitch for the weight. I can surf but not wakeboard with the ballast maxed. Jim from ACME is sending me a prop that he thinks will work better. I measured the distance from the prop to the closest point on the hull and cannot run a larger diameter prop on my 2020. Maybe the 2021 can handle a larger one. Unless you have a very long distance to travel in the boat to your favourite spot, say 10 or more miles, I would go for the prop with the least pitch recommended by skiers choice. “I wish My boat handled less ballast”- said by no one, ever.