Help on Solid Intersection, Easy solids - hard intersection :)

Hello guys, there is a solid intersection help required here

What sort of data flow is required in order to achieve what I seek,

There are to fins which are to be generated from the BREP surface which I have to dissect

Internalized the curves and any help would be much appreciated, attaching the script below

fins construction.gh (23.2 KB)

Thank you:)

You need to flatten the input for the 4 surfaces to join into one closed brep.

Then the 60 rectangles aren’t extruded so the boolean difference does not work.

Here’s one way to do it:

fins construction.gh (37.5 KB)

Thank you for your kind support @martinsiegrist
Many Thanks for the input!!