Another ACME prop question. Have read the previous posts on the ACME props and I am willing to try one on the boat to replace the stock four blade. Has anyone tried the 314-425 ? The 449 sounds like a good replacement as well ? Any comments. Boat is used for boarding with 1200 lbs ballast as well as surfing with about the same. I do not want to give up too much top end speed as the boat is already topping out at 37 mph.