Diagrid from Curved Surfaces

I'm relatively new to grasshopper. I have a curved and twisted polysurface that I need to apply a diagrid to but every script I've tried, it tells me that the surface failed to load without telling me how to fix it. I've also tried contouring my object then re-lofting the surface in Grasshopper but it never seems able to get the top half lofted properly. I'm getting desperate and short on time, all help is welcome. I'm attaching the various GH files I've been playing with as well as the Rhino file.

Thanks,

Tyler