Quick and easy to print. This models does not have thick walls like other boxes, but is constructed with 2mm wall thickness throughout, so the printer is not busy filling the walls and you save filament and time!
As you can read in the comments on printables, the v4 model may not hold the v3 models securely when they are heavily loaded and stacked in the v4.
I have therefore modified the v4 model and made cut-outs in the sides so that a support can be clipped in.
so if anyone has problems you can download v4.1 with the stiffenig support.stl in the downloads.
If anything else can be improved just write it in the comments :)