Designed based on a printables design by "Blocker" - I done this from the ground up to suit my needs but the inspiration is from this creation.
The design consists of two parts: one for the front side and another for the back of the shelf. You can print the parts and attach them to the shelf with a rod (metal or wood) in the middle to create a sturdy and functional filament storage rack. This solution is simple and effective, and it can help you keep your 3D printing filaments organized and easily accessible. I have been getting 5 spools be row, so 10 per Cube - there are also screw holes you can use to attach to the cube if deisred (I haven't)
I had rods of approx 16mm diameter so the holes for the rods are 17mm on this model, each rod length is approx 333mm but measure your own cube twice and cut once
If you need a different size hole just let me know and I can adjust and upload