Just to throw another variable into the mix, Extreme flight has a 40 size profile arf that is almost ready to ship from china that should be a goodie in a few more weeks. I own the OMP and have built and flown a sledge. They are very similar but different airplanes. IMO the sledge will elevator and hang a touch easier than the OMP and the OMP outshines the sledge in it's flat spin ability (climbing inverted flat spins on low rate elevator) and has less high rate rudder coupling in HA KE than the sledge but I know all these factors have to do with your final weight and how true you build it. The shorter coupling on the OMP requires much less elevator to do harriers. They both are great lil fun ships. Enjoy, Heck do what many others have done and buy both