electronics experts: what component am I looking for?

[Amateur_Barbarian]

@Machine_Elf

We hobbyists wouldn’t have much to do if we always settled for off-the-shelf solutions with inherent compromises.

I didn’t propose an off-the-shelf solution. I just didn’t start with NASA Design Protocol Reference, Volume 36, Chapter 29, Subsection B(2) for something as trivial in your field as a wall shelf.