Reacting Material Thickness

Hi everyone, I'm busy working on a waffle grid-esque project and I'm struggling to get a gradient in material thickness in my grid lines. I want the centre lines to be the thinnest while the edge being solid. I'm having trouble working with either NURBS or Meshes as I think my script is getting confusing trying to convert between them for this.

I've attached both my rhino file and gh - all help appreciated! I've got 2 days to get this project complete. I'm also trying to get the deepest points in the grid to produce floor plates behind the grid (being a facade), any help there would also be awesome!

Thanks