Delete Part of Loft

Hello, I want to delete the lower part of this loft. The problem ist the two curves do not intersect. any ideas?

Rhino.3dm (2.7 MB) (25.9 KB) (26.3 KB)

Thank you very much

And maybe do you know a way (with kangaroo) to make the Loft look like this?:

Wouldn’t it be easier to avoid that problem in the first place?

DUPLICATE THREAD / post: Mission creep (moving goal posts).