Your CG needs to be right on the mark too. A little aft helps, but you don't want to get it too far back. When you do a vertical up line, does it try to nose over on you? If it does, add some up thrust. That will help your tourque rolls too. A tip that helps me is when the top of the plane is facing you, use the Tx to control the nose. When the belly of the plane is facing you, use the Tx to control the tail.