Hi David, also you previously wrote:

> So this time I'm trying to build a simple shape to tackle the basis.

From a "CAD" point of view that's not really a simple shape at all, it would be hard to make a blueprint of it with dimensions on it, there's not any straight lines or things that correspond to constant radius fillets.

The less that a piece has any kind of straight lines in it at all and is all only bendy swoopy stuff, the less of a match it becomes for a CAD toolset, it becomes difficult to drive the design primarily by 2D curves.

NURBS modeling is best suited for models that can be formed by 2D curves - that's when your model will be very quickly and easily created by CAD. If your model is pretty different from that then by CAD standards it's not a simple shape at all and you may be better off doing it in an organic sculpting environment rather than in a CAD environment.

- Michael