just got my 2004 magic wizard 575sci out on the water yesterday and was a little disapointed. pushing 8lbs of boost @ 5000 rpm it would only run 61 mph. i did the math and the #'s say 36% slip. it's a 30p 4 blade bravo prop. that was about 5400ft of elevation. any ideas on what i should do? i know there is probably more info needed so let me know and i will try to answer them. thx, Tony