Michael,

Thanks for your quality input. This thread has made me learn a few more tricks. I never quite understood before what the “Maintain Tangent” option did. I had tried tu use it but I saw no noticeable difference. Now I know (at least I think I know…)

On a related topic, what about this cage editing tool that is part of Rhino 4.0 ? Is this a kind of thing that would make smooth deformations easier for NURBS objects? Is it on the wish list for MoI ?