Hi Michael,

From the file I sent...in the Top view...

1. Left most surface gives me a huge boundary rectangle...more than double the surface area of the object. No UV curves created.
2. Middle surface...gives me a microscopic boundary rectangle. No UV curves created.
3. Right surface (rebuilt) gives me a very very small UV curves of the surface...which appear to be compressed/shortened vs the Rhino Create UV curves.
No Boundary rectangle created.

I think I'll have to stick to Rhino for surface UV curves for accuracy.

Thanks,

M