Hi Michael,

Thanks for the clarification, that all now makes more sense!
...I'd had a feeling it was going to be something simple I didn't quite understand!!

With regards to updating Rebuild & changing how it does this now...I guess this would depend on what other users imagine it should work like?
If this current way is the standard way that most NURBS programs would be doing a Rebuild, then I'd say leave it as is?
If the current way is actually causing too much confusion, then I'd agree that it would need to be changed.

regards Colin