Wanhao Dial Gauge Holder

This is a "remake" of an XYZ dial gauge/indicator holder. I tried many different ones--one that clipped on to the extruder motor, one that "hung" on the X linear rails, but none were repeatable nor was I ever satisfied that I could get a reading over all of the bed. So, I took a design that I liked from an XYZ dial gauge holder but redid it to work with the Wanhao/Monoprice Maker Select/Cocoon 3D printer.

The gauge holder needs a 1/4-20 x 1inch bolt/nut or M6 x 25mm bolt/nut to retain the d