Ran into the image limit on the post: here’s the updated, final Blueprint, which has the tangent length hardcoded to match the length of each segment:
And finally, showing that it works generically, here is the same spline with 4, 8, 12, 16, and 20 meshes repeated along its length. The fourth spline has the actual spline points overlaid, showing that there are a variety of point spacings and tangents used in this test.