The author remixed this model.
I added a chamfer to the back of the piece to ensure a perfect fit with the box I purchased and reinforced the structure since the first print was too fragile. Additionally, by adding the chamfers, I reduced the size of the hygrometer slot by a few tenths of a millimeter, as in the first print, the hygrometer was too loose and would easily pop out with minimal pressure.
I removed the slots for the nuts and adjusted the holes to fit bronze bushings (M4x10 Short), making assembly and future maintenance easier. I also redesigned and added a spool holder to the file, including two holes at the ends for bronze bushings (M4x10 Short). This way, the file contains the complete piece with all necessary features.
The countersinks visible in the photos were made during assembly.