Not much to say. This is intended to be used to create non-square grid coordinates for Harbor Freight medium storage containers. This allows the boxes to lock-in to both the base grid and top lid grid to prevent containers from shifting.
HF grid uses 2x 4x5 and 2x 2x2 grids to fill the base. These should also be stackable.
The author remixed this model.
Modified SCAD to allow for customized non-square grid coordinates.