...ok, MIS TAKE.
I had made a sweep with the notch profile. And then a cut perpendicular to the spline and thought: Looks like a circle > is a circle. WRONG...hmmm´grmpfl...
My idea now is to work with an array. Starting from the two already rotated profiles in a clean side view.
Problem: I would like to place the array profiles where the spline points describe the tight curves. To use them in the sweep. How do I achieve this?