I decided onesidedly that I think that an object navigator would be a good thing without being a whiner.
Anyway, I doubt that what I have seen in this model is due to conversions. Not all of them anyway. One reason for that is that many of the objects have never been true solids (and they're not so now either). And another reason is that you'll find fillets cutting into other fillets and crisscrossing... like you most probably would be able to do only in Rhino, or the alike. (If you are not a Norwegian and if not being fully sober, that is. ).
See some close up examples below. Let's vote for what kind of modeling tool was used for producing this level of "creative craftmanship." Probably not a solid-modeller in my opinion.
_Fig. 1: I was going to say something about this one, but I find myself at loss of words. But OK, one word: "Skillz" (and this one looks nice compared to another one which I couldn't find at this moment) :
Fig 2. Well, this surface is actually smooth, but I really didn't expect that kind of solution :
And many more places which I fail to find right now. Plus a bunch of "bad objects" of the kind I sometimes find being produced by Rhino (but of course I don't know if other software makes them as well, those self intersecting edge loops etc, I just didn't expect stricter solid-modeller software to allow for open surfaces and the typical oddities that comes with that, but I'm new to CAD so what do I know).
BTW, I have a daughter living in Oslo having a boyfriend from Bergen. So I can only say good things about Norway in these days.
Ha en mycket trevlig helg!