Sturdy Filament Spool Rack Fully Printable

This filament rack holds up to 6 spools and prints in under 10 hours—perfect to run overnight and have it ready by morning. Since the A1 mini can’t handle 450mm-long rods, the design splits the main tube into three segments, connected with pins. I’ve tested it: 12mm-diameter pins slide in smoothly—tight enough to hold firm, yet easy to disassemble. If you prefer a stronger, interference fit, you can increase the pin diameter to 12.2mm. Be warned: it’ll be extremely tight—expect to use a hammer—and once it's in, it's not coming back out easily. You can also use a 20mm water pipe if you have one on hand. In fact, the very first version of this design used a water pipe as the connector. Of course, if you’d like, you can also extend the tube to a longer length—feel free to modify it as needed. If this model receives more than three comments, I’ll release a modular, multi-layer version of the filament rack. 😉