It's only 21 questions because we have broached a dozen or so different solutions. Some applicable, some not. The ones that weren't were because of things that a) I hadn't considered, b) I didn't state (such as a single input ruling out the dip switch option), c) that didn't apply, or c) someone was smart enough to think of. And I appreciate all of them, even others don't like the rambling that appears to stray from the main point. I find the discussions valuable because even if the whole solution doesn't fit, part of it may lead someone in a new direction, possibly toward an eligant solution. And I would consider this "cloud problem solving" with lots of people from all over chiming with ideas, suggestions, and critique on each others designs.
1. I thought of them but worried that setting the variety I found, would lead to inconsistancies from build to build. Not to mention something for someone to fiddle with on the production floorwhen they think they can "make it a little better".
2. I was vaguely aware of them. The ones I found were way overkill, these are closer but still appear to be overkill in many ways.
3. Though applicable to my other home project, these are a little out of my pocket's price range.