Jim:

Not being on the sticks, I can only relate as to plane location and rudder movement.
Come along flight pattern and in front of you, start a climb at 45/60 deg. and rotate 90 deg.
Hit full rudder while in climbing knife-edge (not full throttle). As nose drops down to almost
vertical, hit full throttle keeping rudder locked over. If you catch on to the throttle movement,
it should do two or three cartwheels. The rudder throw has to be max. near 45 deg. and a very
strong metal gear servo.