I created this to simplify my spool holder. The stl is perfect for my spools, using 624 bearings, and m4 25mm fasteners. I was inspired by markab's design, but couldn't get his scad/stl output to slice correctly, so whipped up this simplified version. Feel free to add improvements, either here, or on github: https://github.com/blackguest/models-spool_standI printed two of these, and in each one, used 624 bearings, and m4 fasteners/washers/nuts.