Hi Rob, yeah I'd like to put in something to do that.

One thing that has got me stopped up from doing that before was deciding whether to add that option in to Offset, or whether that should be added to the Shell command instead, as a way to "shell" a curve.

But even though it is kind of like shelling, it may just be easier to add it in to Offset since Shell does not currently do anything at all for curves, while Offset is all set up to handle curves already with all the various curve-specific options in there...

- Michael