RE: Expos for 3D flying
Granted, I am far from a 3D expert, but I have found that I don't like too much expo. I still use quite a bit, but just enough to make the plane flyable around nuetral. If you crank the expo too high up, it will be extremely difficult to get the control surfaces in every position available. Slowly move the stick and all of a sudden, within very little movement of the stick, the control surface will jump from 50% throw(for example) to nearly full throw. If you need 75% throw, your out of luck. In a hover, too much expo can cause the "chase your tail around the sky" syndrome. At least it did for me. Backing off help alot.
Mike