Square tubing filament rack and roller

Just what the world needs, another custom filament roller. This one can be configured as a filament spool rack, roller, or both, in an almost infinite number of permutations.

This fully annotated OpenSCAD code will render connectors and roller bearing supports to build your custom filament rack and/or roller from aluminum square tubing. The variable dimensions are pre-configured for standard 1" x 0.065" wall tubing, but should be easily customizable for other sizes (not extensively tested).