I have a friend who wants some lessons from me. I'm not a CGT (certified guitar teacher) but probably certifiable. Anyhoo... He's a lefty. He knows some chords and basics, and has a guitar set up for left handed play (upside down for me). Any tips on how the approach should be different in teaching? It sounds like a non issue until you really start trying to get a handle on it, then you realize that it does cause some problems.