generative modeling for Rhino
As far as I can see, the only error that shows in your definition is the Brep-Plane component failing for one plane because the plane does not intersect the brep. That is the right-most plane. Also, I'm not quite sure what you're trying to achieve, what is going to be lasercut?
You were right I didnt realize that the curves should be sectional lines of the surface.
What I want to do is to distribute the section curves on the two production sheets related to U and V directions, so that I can offset them afterwards in order to make a parallel series of ribs to laser cut.
Hmmm, I'm still not sure exactly what you're trying to accomplish, but have you looked into wafflescript?
Perhaps like this: