Thank you very much!

It has a certain retro cold war look indeed. :)

Because of some normal-based smoothing artifacts, I had to use a technique (Split Edge modifier in Blender) that caused some of the polygons to become faceted in stead of the illusion of being smooth / rounded. But as the 3D print also is faceted, it's OK.

Michael, I encountered a few open edges in my model, which made the model non-manifold and not suitable for 3D printing. I tried exporting with different poly counts and settings, but the problem areas remained. If you want to take a look at the scene, I can send it to you.

All the best,

Metin