I thought I'd have a go at a sharpie holder, it does work although the springs need be weaker, if anyone wants to improve on this then let me have a copy of the stl file, it bolts right on to the extruder bowden mount, mine is used on the HyperCube printer

If any one would like the original cad files then inbox me, I am sure this can be improved :)

Category: 3D Printer Extruders