The geometry for the Caves tray was built in MeshMixer to allow me to adjust the heights of all the chip cavities for the other trays; the Swamp tray is a tweaked more heavily in Meshmixer since we need to fit 5 chips in the base - I can't upload those here but will elsewhere. Since there are so many geometric primitives, the result isn't easy to combine as a single solid STL using mesh booleans - the tray design then becomes a negative part in the final slice after adding text labels.