I see the combine polynurb command. There a subtract polynurb from another polynurb command? I can't find it. could you send me a screenshot.
Also earlier today during a training webinare on Evolve/Inspire I saw the instructor dynamically change the curvature radius on a polynurb. I did not catch the command he was doing to accomplish this on the Inspire inspired bracket he was working on. The tool he was using was shapening the radius of the polynurb edge.