Taking inspiration from Steve's Less Thin Hexagon Parts Tray, this is a complete rebuild that is not dimensionally exact to the original. It alters the geometry to allow infinite sideways expansion.
New update adds support for 20x5x2 magnets that hold the trays together (two per slot), and cute little plugs to close the magnet holder when done. The large ones are friction fit, the smaller ones will need a dot of CA glue to hold them on.
If you print the magnetic version, be sure to check the orientation of your magnets before you close up the magnet holders.
Print at least one end piece, and then add as many tesselate pieces as you would like to lengthen the tray. Magnetic and non-magnetic versions are size-compatible, so mix and match as you prefer.
Be the master of your own domain as you expand the tray for every size project!
The author remixed this model.