Print this with with the base flat to the print bed. You need supports just for the 2 ledges that insert into the track. I just painted them on and they come right off after the print is done. You attach the mount to the base of the Domino and it inserts into the track flush with the edge. This makes it super easy to line up your marks.
Hardware needed:
2 M5x16 Bolts
2 M5 Knurled knobs https://www.printables.com/model/441885-knurled-m3-m8-thumbscrews-no-support/files
The author marked this model as their own original creation.