Hi @Supervolant,
It seems like your CAD model is much cleaner than before, which is great!
However, I still see some potential issues, as I’d mentioned this is why it’s so difficult to work with STL files for the OpenFOAM incompressible study. Something went wrong in the facet splitting of your model, for instance, and this small surface was generated:
You need to keep in mind that, as the standard/hex meshers work by fitting element faces onto surfaces, working with STL files will be inherently complex.
As a last comment, if your model is clean enough, there is no issue in using the Standard mesher - which I would strongly advise you to do since it’s simpler to work with.
Cheers
Igor