dont bother buyin 'em if you dont get 'em centered. And going 1 or 2 back wont help at all becuase not only is that a pretty small difference as far as where it's mounted, but they're so skinny they aren't gonna float at all so might at well stick with center and have an outrageously dope park ski and maybe rent out wets or just make due with what ya got, I dont think 1 or 2 would help too much for pow.