I'm running a 25 xl, was running a Fury 4 25 that Ronnie Gilbert had worked for me, the Fury threw a blade a couple months ago, so I put the Razor on. I had been running the Fury with all 8 vents open, holeshot was great on my Puma FTD with my Honda 250, so I figured I would try the Razor with all 8 open. It would not get on plane with me and my partner in the boat. Put 4 back in and all is well. I actually need to send it back to Mark to get him to tweak it for my set up. My top in is not as good as the Fury 4 25.