This is a design for a desktop Rasberry Pi cluster. The components are printed on the 3D printer and held together with the aid of four 6mm threaded rods cut to length.

The idea essentially came from a design on thingiverse which I was unable to print. The main problem was overhangs. So I completely redesigned it in OpenSCAD.

The original design was to be rack mounted. However, I wanted a desktop mount that wouldn't topple over with the weight of wires. So I stuck big feet on it.

The carriages are designed to be screw mounts. However super glue is easier.

It's been expanded a bit now. New threaded rods were cut to 250mm and nyloc 6mm nuts added. Those hardware bits just came from Bunnings Hardware down the street.
Shown are Rainforest, Phone charger 5 way power for RPIs, ADSL (soon to be replaced by NBN), 16 port switch, 2 x 3T partially in RAID 1 (1T), 250GB SSD, 2 x 1T RAID1, 2 x RPI2, 2 x RPI 3. Additional hosts have been added leaving only 1 bay free. Another round of expansion will be needed soon. Color is the biggest issue right now.
Fedora 2527, Docker with 1217 containers so far (software is out of scope for this page).