I wanted one of these for use in a workshop environment - we have wood that we can attach it to, so I added two screw holes (1mm smaller diameter than shown in pics).
Now with V4 there are two sizes provided, STEP and Fusion 360 files included in case you want to change something. Remember that if you rescale it in your slicer, the holes will change size too.
Bigger print is Prusament ASA Galaxy Black, 0.5CHT, 0.2mm layers, 4-5 perimeters on a Voron V0.1. I think PETG would be a great material to use for this item. Newer photo of smaller version is eSun ABS+ on a Prusa Mk3S, 0.2mm layers.
The author remixed this model.