> if you make the larger pentagon a plane using the planar tool
> then boolean subtract the inner line

Hi Tim, this was definitely the right idea - just one tip I'd add is that you can select both the outside and the inner curves when you run Planar (or Extrude directly), and that will let you skip the boolean step.

Planar and extrude both can process multiple curves in one go, they know how to make cavities or holes for inner nested loops.

- Michael

Okay thanks guys, I knew it was something I was doing wrong, just didn't know what!

It's these kinds of "best practices" that get me every now and then with NURBS modeling - I attempted to do that several ways, I was even going to try just extruding the two curves but wasn't sure if it would "close" them into a face during the extrude. In fact, I think I tried it that way once before (with the last beta) but perhaps I didn't pay attention to the available options for closing them together...

Back to playing around - thanks again!

-Will