Thank you, I didn't even have any doubts that I was drawing in a different plane, apparently pushing out at the previous step somehow affected this, so I'll have to keep this in mind all the time.
re:
> Can you put a rounded bevel (0,15 mm) to this model in attachment ?
The maximum it will go is 0.04 units. To go larger the profile curves will need to be cleaned up some more to remove those tiny line segments that Pilou shows above.
I've attached a version that has those removed, it can now be filleted at your target 0.15 radius.