Hi Andreas,

re:
> What are the advantages of converting subD to nurb geometry?

It's so you can do a kind of hybrid modeling approach where you can build some element of your model that is organic or blobby shaped in a sub-d modeling program which are usually easier for those type of shapes but then bring it into MoI and do further work on it using things where NURBS modeling is good at like applying boolean cuts from 2D profile curves.

- Michael