...my hubris, in particular.  I finally found and fixed the problem with my card #5 in Ticker Tape.  It wasn't at all where I was looking, but I (re)learned a valuable lesson. I should actually read the manual/schematic if the game contains units I've never encountered.
Also, Australian listeners - a call to action!  Please contact me about the bingo scene (if there was one) in Australia.  I know absolutely nothing, and would love to be educated.