True 3D and pattern planes don't have right or downthrust. Try to hover with right or down thrust. Even with a gyro, the plane will still drift. A HAKE to the left would be easier than the right. Even a regular knife edge would be difficult to pull off. Besides, the P factor with say a X4W or X6W prop isn't near as bad as a 6 or 8. It just gets some getting used to...