Pen/Marker Prusa i3 Adapter

A nice way to print in 2D with your 3D printer :)
For drawing with this, you'll need to set the temperature off (30ºC) in the gcode, and disable the extruder motor (M103 at the very beginning). Then set it to lift 3mm or so when it does retraction (for not to mess the drawing), then attach a pen to your printer and start drawing!