Filament rack

I have prepared a modular system for filaments for you. To assemble the system shown, you will need thin-walled aluminum tubes with a diameter of 22 mm. I used tubes with a length of 940 mm. I used 32 self-tapping screws with countersunk heads to fasten them. The individual parts have holes for the screws. I pre-drilled the aluminum tubes with a 2 mm drill bit. The four-tier rack can hold 52 rolls of filament. To stabilize the rack, I added a tube to the bottom to prevent it from tipping over.