I needed a case for two small circuits (see photo).
In order to make it reusable, I have adapted my design for the Customizer.
The inner dimensions and the wall thickness can be configured. Top and bottom are each half the height and will be connected via snap-in.
Openings must be added later (to the STL / before printing).
Both prints have already survived several snap-in / snap-out operations.
BTW: The parameter Inner Width refers to the outer wall - without the snap-in sockets.
If the width must be available on the entire height, the single wall thickness has to be added to the width.