Compact hexagonal pen plotter holder

A simple pen holder to draw with the Ender 3 and other creality machines.
Can hold a 8mm (side to side) hexagonal pen, fits the Bullseye fan base.

You will need a M3x15 screw with nut to hold the pen.
To mount the holder you also need a M3 screw, add 4mm to the length of the one currently mounted.