My girlfriend need a better way to store her paint and sure enough her paint didn't fit in what someone else had made. The cap down version holds the tubes the best but then you can't see the tube colors. Version 2 slots are a little snug. Version 3 allows for the best, but tubes can fall out when trying to move around as a hole. Don't mind the last print where I kept running out of colors I had.
The author remixed this model.
I blended the two together, had to adjust hole size to fit my paint, and adjusted the row levels to save print material.