Filament Storage Rack

I have so many filaments, I decided to design a Filament Storage Rack to display my filaments in order. Then I made it. I bought some Aluminum tubes（Outer Diameter 20mm, Inner Diameter 15mm）, 1 meter in length as the crossbar(You can customize the length to your needs, but I didn't test the aluminum tube that exceeds 1 meter), and printed the rack model in PLA-CF, the foot in TPU to avoid scratching the desktop(Whether you need this part or not is up to you). The first level needs 2 Aluminum tubes, PLA-CF 668g(Shelves on both sides), TPU 52g( foot), and add 1 level needs 2 Aluminum tubes, PLA-CF 668g(Shelves on both sides), 140g PLA-CF(For filaments with spool) or 270g PLA-CF(For filaments with package). Because the filaments with packages need a higher height.