OnePlus Earbuds case cover

I designed this case a few months ago for my new earbuds, OnePlus Nord Buds. At that time i couldn't find a case (now it's the only thing I see online).
I have had several occasions (not on purpose) since then to test the protection this case added and it works like a charm.
Now I have redesigned it with FreeCad. It was one of my first models. It was a good training model. So I'm sharing all my files to change them if you find the model too tight, want to add texture or something else.
There are also the stl files I used if you are confident enough with me, and the Step files to try modify in any other software.