Very good post Ed. Lot's of info there. One other thing that I've done on top wing aerobatic type planes is to put slight bit of down, (yes DOWN) in both ailerons. Without digital or mixing, this causes the plane to track truer in rolls. It's sort of like automatic differential! Watch it in knife edge as yaw comes into effect. Pitch won't be a problem. Fly and trim is the best way to determine how much is needed. Some top/shoulder wing planes just fly better than others of similar design, so don't always expect this type of plane to do what they claim it will do. Look at your aerobatic mid and low wing planes. Fly similar but track usually straight and true. This reference was for the Tango, which I finally got mine to fly decent, but not really what I felt the plane was advertised to do. If you want this plane to really be a funfly type plane, it HAS to be on the tail heavy (NOT EXAGERATED...). Get it too tail heavy the plane will want to yaw on the balance axis and you'll be flying mostly with rudder just to keep it pointed in the direction you want it to go.