I see that GH Sweep2 returnes an untrimmed surface, even if the section is a polygon, and this I suspect generates further problems when using boolean operations on that object. I know that if I bake it, i get a polysurface but is it possible to get it within Gh?
Thanks!
LATER EDIT:
Found this thread that includes a scriptable component which converts the untrimmed surface into a polysurface