That's good to know csm, I'm trying to figure out if it's essential to run such a beast of a prop like this to be able to surf or if a smaller prop would do just as well. With this prop, there's only about 1/4" to 1/2" clearance on the bottom of the trailer guard. Not sure what the top speed with this 1235 prop is as I didn't even chance running it wide open with that huge vibration. I don't want to lose too much top end as we will be slaloming as well. What prop are you running?