I believe we can marked this one solved.
First, thanks to all, especially PB, for the help. While I am not the most apt pupil, I did learn quite a lot and hope I will remember to apply these lessons in the future.
In the end it wasn't my marginal soldering (although I won't rule it out going forward) that was the source of trouble.
After removing it numerous times from the custom, copper tape lined box it shares with the S.E.X. and reflowing joints, checking the #s, returning it and having it work and then turning it on another time to not work (or vice versa) I realized the common thread:
It always checked-out outside the box. A tight fit, the right C4S board barely touched/barely didn't touch the box. Slightly melt one side of the stand-offs with the iron while applying pressure and the board cants slightly forward. Problem solved. (enter embarrassed emoticon here)