RE: Converting 3 channel to 4
Most planes that have ailerons can't really be flown rudder only very well. But it all depends on the plane. Flying with ailerons is a lot easier than you are making it out to be, just bank and yank and you'll be fine. Later you can mix in some fine tuning of getting just the right amount of rudder, aileron, and elevator going at the same time to make some really pretty banking turns. Really scale, too.