Whew -- the more I try to do of these, the worse it gets. "These" being an exercise in trying to make the complex simple. I get bogged down. This is the 3rd or 4th, and still not getting the look I'm after. I will try again tomorrow, maybe repeat one of the ones I've already done so as to force a different approach to an old problem, instead of reinventing the same square wheel all the time.