My timber rack-shelf-thing, with no cutting.
600×250mm floating shelf 16mm, 3 of
1200×250mm floating shelf 16mm, 2 of
1200×30×18mm pine, 1 of
60mm 8g countersunk wood screws
20×25mm corner brackets with 5/8" 8g panhead screws for weight-bearing assistance
Top: BELLBIRD—offline XP (now semi-retired) former pseudo NAS, with AVerMedia hi-def capture card
Middle: KREEANNE—4TB (RAID10)
Bottom: KRINNAYE—4TB (mirror)