Small Rugged Box - Compatible with other boxes

I was looking for a rugged case that could clip together, meaning you could carry more than one at a time.after much prototyping i finally came up with a design i was happy with! This is the second box in a series which will enable you to store everything in a compatible system where everything works together!Two of these small boxes fit either above or below the medium container. the smaller insert from this container can fit twice inside the medium box if desired, however to stop them sliding around you would also need to add the small spacer insert. Prints nearly fully without supports, the only parts that need supporting are the clips for interlocking the cases, you could try printing without and laying them flat on the bed but the clip tends to delaminate when connected together. all screws self thread into the model so care needs to be taken when tightening them to ensure they do not strip out. to assemble the case you will need:2 x M3 x16 machine screws2 x M3 x20 machine screws4