Modular Paint Pen holder

I bought these paint pens on Amazon for fine painting and touch up work on my 3D models: https://www.amazon.com/dp/B09VCYS41G. These give me more control than a paint brush and so far flow nicely. Since they came in a flimsy box that wouldn't last long in my hands, I put together a super simple holder for them in groups of 12. There are 24 in the pack so I printed two of them. They are designed to hold the larger of the two end caps with no looseness but won't pull the caps off when a pen is removed (unless you intentionally jam them hard into the holder --- don't do that!). This allows the smaller cap showing the color of the pen to be at the top and easily visible. It fits well on my Bambu P1S bed, either parallel to one of the sides or diagonally with no supports or anything else required. I also printed with 0.20 layers and 10% infill and 2 walls. Comes out very solid. I used PETG but PLA should be fine as well.

Note, the holes are sized to fit the pens I bought on Amazo