I'm reluctant to suggest this because I have NOT tested the results. It is possible that the user could leave out certain feature codes in the corridor, and or switch the connection points from branching Outward to Inward and perhaps those Extraneous TIN faces might be dropped off without the manual edits, or need to create the surface from Feature lines, not links. Just a thought...
Oh wait. I misread this. I think your meaning is .... without manual edits NOR the need to create the surface from feature lines.... am I getting it now? I thought your were offering that as a solution. My bad.
Not to worry, I don't take any of this too personally. And long ago realised that often rejection is just a request for more information. And if you give a person all the information you have it often leads them to the decision you wanted them to make, and they think it was their idea.
