Hi Brian,

re:
> Does this have any speed advantage?

Not much speed advantage, but if you already know which set a curve is supposed to be in if you separate them then you won't run the risk of the automatic sorter making a mistake in classifying them.


re:
> I wonder a bit about what "List of curve orientation values means and how it works.
> But probably do not need it.

They will be created automatically for you if you leave it blank. It stores whether a curve should be flipped from its natural direction when used in the network and where the closing seam point of a closed curve should be switched to from its natural seam when used in the network.


> Saw something about coons patch also...

A Coons patch is when you have just 4 boundary curves, there is an "exact" option that can be used in this case.

- MIchael