Ok so I tried using Transform without luck, I could somehow manage to see the polyline or plot on it… However I did make manual polylines all over and used the same technique you used.
Is there a way to smoothen out the manually created polylines so that they look nice? I did try out Smooth filter on the SplineSource but it did not work.
Here is the state file:
blade-passage-midspan.pvsm (2.5 MB)