While looking for new hardware for our home server (a 19'' mini rack server is very tempting...), I just came across project #minirack
10" rack server builds using a mix of off-the-shelf commercial and #diy #3dprinted mounts, panels, frontplates etc.
Looks interesting (and the mini racks are also rather cute).
Maybe interesting to some of you.
https://github.com/geerlingguy/mini-rack
https://mini-rack.jeffgeerling.com/