Filament rack / shelf - several variants available

Hello 3D printing friends,
I have created this model to organise my filament rolls. 
The holder is available in different sizes for the rods you want to use. 
The holders are available for rods with the following diameters: 

20 mm, 21 mm, 22 mm, 23 mm and 24 mm.

I personally use broomsticks with a diameter of 24 mm.

If you need other diameters, please let me know, a change is easily possible.

You will need 5 mm screws to fix the holder to the wall.
You have the option of screwing the rods to the bracket from below. I have made 4 mm holes for this.

Further updates will follow, I still have a few ideas.

How many brackets you need depends on the stability of your rods.
I have planned three brackets per 120 cm. 
 

I used PLA, 0,2 mm Layer, 25% infill

I have redesigned the frame and the holder in Solidworks 

Unfortunately, the holes in the original model do not fit the rods I bought and I don´t have Fusion3D.