Spindle Pen

A fake spindle that holds a pen. I designed this for Cyclone Factory PCB (http://www.thingiverse.com/thing:49484) I built. I thought it might be useful to draw pcb board first before milling. Might be useful for checking XY gear ratio as well.

Video of Z Probe and Milling: http://youtu.be/mdT-6VdgRn0