simple Roof box 1/16 scale

In my quest to ruin the center of gravity on my WPL D12 i glued a roof box to the roof of the camper.
Maybe someone else has use for it.
Walls are 0.8mm thick. The hinge side is simply connected with tape, on the other side i glued 2 small magnets (2x5mm) in the holes so it snaps shut.