The switch is a bit unusual. My projects are not specified, and the final result is ultimately dependent on what I have in my parts store (a euphemism for rows of boxes containing scrap PCBs!). I salvaged my switch from such a PCB. Having that switch greatly influenced the design. If not for that switch, I might still be ruminating over building a micro-less computer.
I just wish I'd checked whether it was break-before-make
