This is a simple guide for pre-drilling centered, fixed-depth holes for Multiboard mounting using the offset snap method. The guide can be quickly hand screwed to/unscrewed from MB panels. While the MB offset snaps can themselves be used in situ as guides for drilling mounting holes, I had a large installation to pre-drill and I didn't want to damage either the MB components or the backing material by overdrilling.

The guide has a small relief to seat a metal washer to protect the surface of the guide from the drill chuck. The washer pictured has O.D. 12mm, I.D. 6.25mm and thickness 0.9mm. It's just a junk flat washer from an old assortment. I attached it with a drop of super glue.

I.D. : (4.75mm) - appropriate for 11/64th / #8 tapered bit Height : 29.66mm

Printed with 25% gyroid infill, 3 wall loops in PLA Matte. I'm sure it would work with other settings. You may need to bore out the inner hole slightly depending on wall ordering and material.