Migbot Prusa i3 Overhead Spool holder

Being tired of the "bystanding" spool holder of the Migbot i3 I thought I could put the three bolts holding the two top rod guides in place to good use.

This spool holder attaches to the existing holes and allows to mount a spool with up to 24cm in diameter over the printer.

This removes stress on the x-Axis where the print head has to "pull" the filament to the side, and instead allows the printhead to pull the filament downwards.

Make sure your spool is spinning easily to avoid