I got the mode 1 part during my second post Speed, just not often a transmitter is set up to use it as it's totally different than what you will see in a full sized aircraft. If you look at an F-16, for example, right stick has ailerons and stabilators, left has throttle, pretty much duplicated in mode 2. As for what more channels can do, I was trying to keep it simple as not all transmitters can put a servo on it's own surface. My 9CAP can in vee tail mode with dual aileron servos and retracts but I don't think it can do it with a standard tail configuration, would have to go check the manual. He is looking at an 8 channel system so I couldn't see getting into what a system can or can't do without knowing what he's getting, no need at this point. I also didn't get into S-Bus for a similar reason, it gets complicated and getting overly complicated is not what someone needs when they are getting back into the hobby after a 20+ year absence