Piani ruotati differentemente: come unificarli? - plans rotated differently: how to unify them?

I have a small problem that I can’t solve.
The attached algorithm must produce a series of extrusions along some segments. The segments are taken from the sides of a polyline with the “contour” component. I then used “plane normal” to position the sections to be extruded. The problem is that the plans have different orientations of the “Y” axis. this fact causes the sections to rotate differently. I need sections all oriented with the same “Y” axis. How can I fix this?
Thank you all.

Travi per forum.gh (27.3 KB)

White group…

Hallo Jakinta, it’s magic.
Thank you very, very much, now I have to study to understand why it works and not before.
Thanks again