The original did not fit the corresponding Ring part. The ridge on it was misaligned and the item itself was a tad too short. This is just a remix to correct those issues.
I used the STL of the Ring itself as a starting point and adjusted from there.
That part of the model was fabulous, by the way!
Anyway, I'm opting to include only the STL of this bit (and not the CAD files) since according to ArnaudTD's photos, they probably have already fixed this and just posted the wrong STL.
Cheers!
&
Always Be Printing
The author remixed this model.
Recreated from the base Case Ring STL from the original posting.
Model is a slightly different size all around, including the screw holes and it fits a little more snugly than the original, while ensuring the alignment of the ridge for the lid/case.
The counter-sunk holes fit socket-cap M3 screws.