Paint Holder / Brush Holder / Tool Holder

This holder is made for my acrylic paint collection. The Paint holes have a diameter of 22mm. The paint i use is called Amsterdam set 24 colors 20 ml tubes.

Update-1, 9-3-2018
The design is done (So far) I sorted them into three categories A, B & C. You decide witch one is best. 15% infill is enough.

D, Is for the Tool/Brush holders. You can just glue them on the back of the paint holder or keep them separate. 30% infill on these works best.

Update-2, 10-3-2018
I made a new extension