Hi Chris, yeah unfortunately a model like that is going to be a pretty advanced and difficult challenge. That's because it's made up of a lot of sculptured surfaces and things blending into one another.

NURBS modeling is best suited for objects where you can create some key curves that define the shape of your object, and then you build surfaces from those curves and can intersect and cut surfaces in some areas to remove material, and then use fillets to round off sharp corners where the surfaces run into one another.

As you get to models where individual surfaces are not so distinct, you basically start to leave this area where NURBS modeling fits in really well and start to get more into the area of organic shape modeling which is usually best done with a sub-division surface polygon modeling program which uses a much different approach than MoI for constructing objects.

Your model here is getting quite a bit towards that area of potentially being a better fit for sub-d modeling instead. But it's in kind of a gray area, it could be possible to do it with NURBS but it will require using a lot more advanced areas of the toolset.

- Michael