Voronoï Pen Sleeve

thingiverse

For when you have a cartridge / pen insert of 3.20mm, but not anymore the "body" (or if you only buy the first). Beside the voronoi idea, there is also the "laying flat" one that use the principle of showing the infill pattern (no top, no bottom, retract also during the infill, and choose a nice pattern, like "honeycomb"). Just need to design a cap now :)