Want to build a RepRack but also save filament? This design is your answer. It's a space-efficient alternative that lets you store two spools one inside the rack and one on top with minimal material usage.

The rack stands at 254mm tall, so you'll need a printer with a large build volume. The bottom section is 205mm, which is just tall enough to fit a standard 1kg filament spool. The top section is open, giving you unlimited vertical space perfect if you're not placing anything above it.

Want to stack another rack or enclose the top spool in a box? No problem. I've included a mounting template that spaces the next rack just enough (215mm) to accommodate a filament box. Just align the template with the rack above, mark the holes, and drill.