I have a situation that I've never experienced before in 50 yrs. of RC. I'm flying a great planes Revolver ( odd name for airplane) but anyway it flies extremly well. Nice consecutive rolls right or left, great snaps and spins upright or inverted, excellent knife edge,straight or circle etc., good inside loops but will not do outsides. It rolls out each time I try them. I have tried increasing and decreasing elevator throw. Increasing makes it worse decreasing will hardly even try to loop. It has split elevators so have checked the throw of each side and is equal. Otherwise a good plane, a bit fast on landing so use flaperons.Any thoughts on this?