Hi elinelecoutour, I noticed your profile and would like to offer you my project.
I would like an enclosure which is circular with a height of 40mm, an inner diameter of 80mm and a wall and base thickness of 5mm. The base would be raised 5mm within the inner diameter. Additionally I would like the lid to fit telescopically and neatly into the base, with a wall thickness of 2mm and have a height of 40mm (so it will protrude 5mm at the top). Would you be interested in producing a CAD model (open format) and STL file for such an enclosure? There may be further projects to refine this model.