Hi Oliver, it turned out really great!

re: file size - little tiny fillets tend to take up a lot of space in something like that. If you turn on the surface control points (which you can do by using Edit/Separate first and then using Show pts) for those little tiny fillets you can see that they tend to have a lot of control points in their surfaces, since they have a tightly curved shape.

You may try putting chamfers instead on ones that are on smaller areas, that can help to reduce file size.

- Michael