No problem Tom - although I'm still a little worried from your description of focusing on extracting curves and using the Network command that possibly your actual models are not as NURBS-friendly as you might think.... The most NURBS friendly type of modeling is when you are primarily constructing things with 2D profile curves and doing extrusions, revolves, and boolean cutting operations. If your modeling requires all construction by using network over curves that are warping around in 3D space rather than primarily 2D curves, that often is in the "organic modeling" category that tends to be better done using sub-d modeling instead...

- Michael