Kangoroo issues mesh to singel surface and joining

Hello.20201222.3dm (190.8 KB) 20201222.gh (17.6 KB)

I´m a studying architecture. For my project work with a minimal surface. Its created between two curves. Further the structure is solved in kangaroo. I´m struggle to convert the generated mesh into a solid nurbs surface. For the next step to complete the geometry I have to add different forms which should then become one smooth humogen structure. I´m a bit lost what the best way is to proceed my model. If you have any helpful advice, I would be very grateful.