What a cool project Leo! Thanks for taking us through the process. Btw, the video on post 16 isn’t available.
That was a fun video, thanks for taking the time time to put it together.

Kind of a side question, I was thinking about your comment on the dirty keyboard and the shop environment and remembered seeing membrane keyboards at medical offices that are smooth top, wipe clean. I've never used one so I'm not sure how nice (or not...) they are to use but they seem like a decent idea for a shop keyboard so was kind of wondering if anyone had actually used one (they are a fair bit more $$ though.. so probably cheaper to just burn through several "regular" keyboards hah).
I think in the last 20 years I’ve only replaced one shop keyboard (due to a spilled drink) a blast of air usually gets them cleared out.