diagrid laths, sweeping curves along curves

I am working on a definition for generating gridshells and lattice structures for my students and have come across a sticking point. The form and diagrid I am working on is not too complex, but I have been unable to find a simple way extruding / sweeping / lofting curves to form the alternating sets of laths need to make the structure. There are two primary points I could use some help with.

 1.) Using the Lunchbox Diagrid Structure I created the base form of the diagrid over my original surface form. From there I was able to offset the surface and map the diagrid intersection points to the new offset using surface closest point. I was unable to create interpolated curves directly from the list of points, so I had to partition the list of points and use a tree item component to create interpolated curves. (I was able to speed the creation up by rotating the lines to duplicate the other half of the shell - though this would be impossible in an asymmetrical form). How can this be done with a cull pattern or similar?

2.) Once the correct points are connected for the interpolated curves I was able to offset them on the surface, but was unable to create a successful sweep / extrude / loft for the laths. The caveat is the laths must maintain their cross sectional shape  all along the curve. I resolved it by selecting Brep edges and using series and list item to create appropriate selection patterns and creating 4 ruled surfaces for each lath. I have been unable to cap the ends or make the laths closed surfaces.

Any and all thoughts would be welcomed.