This mount allows a single Mac Mini (2012 model - check dimensions if yours is different) to be fastened to a 1u 19" equipment rack shelf. It includes a push rod and lever to operate the power switch from the front of the rack (cables to the back). The width allows 2 mac mini's to be mounted side by side in a 1u shelf.
Once printed the push rod needs a little gentle sanding to make it move freely through the holes provided for it. A 3mm nut and bolt attach it to the lever and a small self tapping screw and washer secure the lever to its' stud. The assembly can be held down with 3mm nuts and bolts on the side with the lever (holes provided in the base) and self tapping screws to the other side (use the top bracket as a template to align your holes - same spacing). The 2 top brackets securely hold the mac mini down.
The bracket is designed to not have any elements passing under the mac mini to preserve airflow from front to back.
Printed mine in PLA. Printed all parts upright except for the push rod, which has a flat surface on its' back.