Panels and Structure from 3 surfaces?

Hello everyone!

I’m trying to create a combination of panelized surfaces and the structure that supports them from three  separate  lofted surfaces. First I created four curves  ranging in height and then I lofted them by couples. Then I am using the attached definition but the result has a problem. The lines (in v direction) of the generated grids mismatch with each other.

How can I make the points on the edges to fit together?

And second question:

How can I optimize the surface’s isocurves  (to make them perpendicular to the edge)?

*warning! opening the gh file in Rhino takes some time ;)

I would be grateful for any assistance!

Thanks in advance!