Triangular Spool Holder

This is a fully printed spool holder, using equilateral triangles as base shape. The axis just lay on the stand and rotates with little friction.

STL files are provided for a spool of radius 100mm, with a hole of diameter 54mm and height 62mm. The parameters can be changed in the scad file.

Update: I uploaded an improved version (stronger) as triangular_spool_holder_v2.scad. See the updated printing instructions

Update for version 3: I made several improvements to my previous design, mainly replacing the press-fit system by a screwing mechanism. The new version has several advantages:
- The rod/bolt mechanism is not subject to wear as the press-fit system was, so it will not become loose after many spool changes
- The parts are more generic: the same set can now be used with a range of spools with different height and hole diameter

To use it, print all "v3" parts (print the "triangle" and "nut" parts twice). You can customize:
- spool_radius: the maximum outer radius of