Straight Skeleton - or how to draw a center line in a polygon or shape?

Dear solub,

first of all, sorry! Sorry that I did not come back to you, especially seeing your excellent research. For whatever reason I did not get any notification that there was an update to my post. I will need a bit of time to read thru it… and try to implement option 1. I will come back to you. Thank you so much.
Mike