Geo Nodes - Create a curve down centre of a tube?

Hi, you’re looking to make a straight skeleton (https://en.wikipedia.org/wiki/Straight_skeleton). There’s no builtin way of doing this but Higgsas has a method : (Higgsas) Geometry Nodes Groups Blender 3.3/3.4/3.5/3.6 - #331 by higgsas

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