The maneuver you described is an immelman, a simple enough maneuver to perform. What I can't understand is: "and by the time I figured out the attitude of the plane I was out of rudder to correct it." Chances are that that is the least effective control on the plane. Depending on the planes true attitude I suspect that ailerons and/or elevator would have been the control of choice. If a 3 channel the rudder would have made a bit more sense.