Print face down with PETG or PLA. Cutouts for the inserts are 4.3mm which is what my template calls for on my printer.
Takes M3 heat-set inserts on the inside of the mount. Otherwise, all the other build instructions and variations on the original model apply.
The author remixed this model.
Resized to fit 10in rack, removed cooling ducts, replaced captured nuts with M3 threaded inserts.