Umm...maybe? :-) The important, interesting part to me is the right-hand side, and I've been thinking on-and-off about hacky ways to connect my existing left-hand side to the right-hand side for a while. If I can in fact put arbitrary digital junk on the right-hand side (I can't see why I couldn't) then I could have multiple bi-color LEDs lit on the basis of multiple switches S1.