Hi Michael

First of all. Im sorry for the late reply. I had a very busy day yesterday and today.


<Were those meant to be planar cross-section surfaces? Those are the ones you don't have in your .3dm file. But it sounds like there is a Grasshopper method to generate those for you automatically?

Yes excactly you don't have those surfaces. But by slicing a solid tube into small pieces you could find the cross section midpoints for each and then connect them all.




<Ok, but to get a tube like that another approach that would be simpler could be to project just one curve onto your solid and then sweep with that rather than cutting out a channel with 2 curves:

<For example, just one profile curve:


Thank you very much for your reply. The suggestion of projecting the curve alle around the solid was a brilliant idea and much easier. I think thats the solution :-).

I really appreciate all the response and kindness here.