A polygon surface meets my needs in terms of producing a finished product. I do not need aerospace finish or accuracy, which I have made abundantly clear in my dicussions about getting the work produced.

If I could machine a million plus poly surface 15 years ago, it can certainly be done now. Its as computationally intensive now as it was 15 years ago.

CNC machines can cut from polys or nurbs. They don't care. What matters is the CAM software that creates the toolpaths, and whether the CNC machine does spline interpolation from G1 moves on the fly.

If was concerned about finish and accuracy I AGREE that nurbs would be preferable for the reasons that have been stated, which I am previously aware of.

I talked to a shop that even had a license of VisualMill. The problem is not machines or software. Unfortunately its ignorance.