Gonk, gotcha - thanks for the explanation - I am bypassing the 990's video switching (if for no other reason than I am in the line of sight of the TV while working out and like to watch some kind of image go by - typically some sports-related thing - while listening to music - anything to distract myself from my own huffing and puffing, I guess). I am single, so that helps, as does the "taming of the inputs" by use of the Harmony remote, which so far has made things simpler, if not completely simple. BTW, love the shuttle launch analogy, if nothing else the complexity ensures that no one else can successfully navigate my system (as long as the Harmony is not in sight...)