Now I am rethinking how I create two adjacent surfaces. Should I use network surface with tangency to the adjacent surface, or, construct a series of curves in U or V and just loft.
This is less challenging in Rhino, BUT, I have to re-do many steps manually in Rhino, so I use GH.
The lofting requires going back a dozen steps and trimming surves all over the place. That will be v32 of this model.