Changes: the hinges of the box are assembled with M3x30mm and I designed my own band.
Many thanks to 3D Printy!
To assemble the Box bottom and Box top,
In the first step, drill the two holes (marked red) with a 3mm drill.
There the screw must not go through there too tightly.
In the second step, push the piece of filament into the middle of the two parts (marked red) then screw in the screws but be careful not to overtighten the screws.
The author remixed this model.
Changed the hinge of the box - in my version these are mounted with M3x30 screws.
A new band designed