Modular holder for miniature paints and brushes

**Update 6-1-2024:** V2, with new locking mechanism. Added optional tray to V1 and V2. I've seen (and tried) a few holders for miniature paints, as 3D models (e.g., https://www.prusaprinters.org/prints/34089-vallejo-army-painter-reaper-paint-and-brush-holder) or laser-cut commercial options on Amazon (e.g., https://www.amazon.com/Broken-Token-Modular-Paint-Straight/dp/B07MZ8Y4MK). But I was looking for something more modular, so I came up with this system: One unit is comprised of two