This is my design of tower for Intel NUC. I have 4 of them that are working as a servers for my homelab and I wanted to have them one on top of another but still be able to reach power button and to have them fixated in the place.

Model includes complete build plates for both shorter and higher models of NUC so they can be combined. I have one longer and 3 shorter variants in my rack.

I used M3 press-in threaded inserts and M3 7mm long hexagon socket head screws for plates and easier (and better) threads.