Also, in regards to the output looking just like the ViaCad one, looks like they may have a mechanism to ignore those inside surface boundries? I wonder if the geometry guy's have been looking at this? (Yeah right, Burr knows what they dont know) Anyway....So maybe if there is an explanation as to why ignoring those interior surface boundries is bad, then that situation would have the ViaCad filet'r fail? Or the hard part is writing the "ignore interior Surface boundries" part.