I’ve posted about this before, but I have since revised them, and today to just release them for free. I’ve posted the designs and source code for making my lasercut Reaper/Vallejo/Warcolour/Army Painter paint racks:
I love these racks, and I figure other people might love having them too. This is the second version of this design, and it just overall works a lot better.
The designs include 3x10, 4x10, 5x10 and 6x10 racks, but the openscad source can be altered to make a rack for any number of droppers X by Y.