wow maybe i am getting way ahead of myself instead of focusing on flying but... but can anyone take a minute and give me a quick lesson in pcm? ppm? and S+Z selectable.. what is all this squash anyway? i been flying for some time now with no worries now i see and hear all this computer lingo like pcm ppm s-z selectable... man what does this all amount to...do they not make anything understandable anymore? thanks