Nice build. We use a lot of aluminium profiles at work for prototyping. We also have a mitre saw ;)
You can also have polycarbonate panels made for cheap to have a more finished appearance at the cost of ventilation and ease of access.
If you want to discover some even more obscure UNIX, SDF is having its Plan9 boot camp this Sunday. You can register now to get an access to their public access Plan9 machine at sdf.org/plan9
Nice! Gemtext and gemini in general is a really cool playground. I also learnt awk to do my gem2web script and all this lead me to web hosting. Very nice technology.
You might be surprised by LHOOQ by Marcel Duchamp then:
https://en.wikipedia.org/wiki/L.H.O.O.Q.