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Good day.
Bringing your attention to the 3D model of boxes for grinding stones such as APEX and diamond blocks.
The archive has STL files for 3D printing, as well as a bonus, the source files.
IMPORTANT, the cover and bottom are connected with a 2 mm rod, which can be taken from a bicycle spoke, great for connecting.

You can look in more detail on my YouTub channel ChuchaTV https://youtu.be/RZncOcwynks
Also in the Chucha TV SHOP https://chuchatv.exaccess.com, you can purchase a ready-made 3D model of a professional sharpener