I didn’t do it earlier because the contours were already recognized as closed curves, but now I think about it probably it’s better practice to pass Brep Edges through a Join Curve, in such a way to get all closed contours (if they are already closed curves, then Join Curves won’t harm)
Nice one! I encounter an overlapping of shapes when i try to scale up this. Last two curves are essentialy same shapes but smaller. Not sure is this about Open Nest or what.
the black thick outlines that look like intersecting each other are just to highlight the simplified shapes used for nesting (you can make them more precise by increasing the Simplify value, now set to 20)
real nesting contours are the ones you visualize in light blue, parts are just nested inside each other