Plotter Pen and Marker Mount Calibrator

When doing 2D plotting, I use multiple pens or markers in a single print. It's a hassle to ensure they all have the same Z offset from the paper, and if I get it wrong, the line thicknesses vary. This device lets me set the height once and use that as a reference to calibrate all the other pens/markers.

Best paired with https://www.thingiverse.com/thing:6945871