| 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
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