Is this more what you were looking for? I used a planar spine for the VSS, though you don't need to. There is a smooth transition between the sections and angles, driven by the graph feature. It's all tied together via relations and parameters. I could have used relations to control the points on the graph to be equal if I'd wanted. One fun thing is that you can do Dynamic Edit on the ANGLE_DEFINITION_POINTS feature's points, and watch it change while you drag it! Unfortunately you can't also do that with the graph.
