Hi Ed,

> I assume if blend could handle multiple edges
> then it could be used like a patch?

Well, not really because it will still be something that is a connection between 2 different sides, just that each side would possibly be a chain of several edges touching end to end.

Patch is different and instead of taking "2 sides", it takes a closed loop of curves/edges.

You can kind of think of Blend as being more like a 2-rail sweep, just with the profile curves being created for you automatically.

- Michael