Have had a Razor 4 XL (Croxton) on my 250 H.O. all season, and I am still amazed what a job it does in all respects. The past couple of weeks, I've been fishing quite a bit on the big water of Erie. On my Z520, this prop is like a rocket out of the hole, even with the live wells filled, provides super acceleration at all speeds, and never slips or blows out. On the weekends, between Kelley's Island and the mainland is like a washing machine, but it's a piece of cake for the Razor 4 XL. Running 2.5 inches prop to pad, never have to lower it and the lift is amazing. Just loving this prop.