Caliper buck mount

Remixed CallJoe's caliper buck to be more modular in which it can be mounted.
Mount uses a M3x4mmx4mm nut
https://www.banggood.com/100pcs-M34mm-H62-Brass-Knurl-Nuts-DIY-Accessories-p-971077.html

8MM and 10MM combines onto mount with M3 X 4MM-6MM to fit onto X axis bars of respective diameters.