I think spinning in is more effective on boats with drives very close together and stepped hulls. On my Sonic 31SS with the drives 35" apart on center and stock 496HO's, I saw absolutely no top speed difference whatsoever. I didn't experience any docking problems, either. But, the only way to know is to try. This is easy with Bravos. Just swap your props and run the sticks in reverse to go forward.