I designed this to use with Testors paints after not being able to find one from Testors. Had a larger version years ago that had mixing pots, bottle storage, etc. as well as spots for brushes and glue and knives when working with models. I did not need the glue and knife spots as I am not using it for models so left them out.

Tray will hold 8 bottles for storage, 4 bottles being used, and a middle slot for a bottle of Testors thinner. There are 4 mixing pots, 4 holes for holding brushes vertically, and a tray for brushes or whatever.

Printed out of PLA (PLA+ technically but should not matter)
.2 mm layers
2 walls
15% infill

.3mf file is from Bambu Studio on an A1

Sorry for the messy tray in the picture. Have been using this for awhile.