Another thing to consider is these trainers are really meant to be flown (turned) with ailerons. I always teach the right side of the transmitter first, ailerons and elevator. That is, putting the airplane into a shallow bank, and apply incremental amounts of elevator to keep the nose level. The rudder is used initially for control on the take off roll to keep things straight, and then as basic turns and landing are mastered, the rudder can be used for cross wind landings and so on. Rudders don't tend to be real effective on these trainers anyway....