I made this simple filament rack that uses 3/4 inch dowels. You will also need to get #8 3/4 inch screws. Cut the wood into (4), 9 inch pieces for the height and however long you want it. I cut my long ones into 21 inch because that's all the room i had but you can change yours. While you do that you will also need to print 4 of the dowel holders. I used PLA with 15% infill, 8mm walls/top, brim and supports.

Creality

Ender-3 v2

Doesn't Matter

Yes

15%