Yes, a friend gave me a rudder and elevator only plane a while back (it wasn't a PBF but had lots of dihedral like a trainer for lots of roll stability and thus, banking with rudder input the same as with my PBF). I set it up and flew it with, of course, the rudder servo plugged into the rudder spot on the receiver. I was not used to using the rudder stick for anything other than knife edge flight or specific aerobatic maneuvers. It was disconcerting for me to fly without aileron control, so after I landed, I plugged the rudder servo into the aileron spot on the receiver. The next flight I felt right at home controlling the rudder with the aileron stick because the rudder had so much influence over the roll control on this plane.