Of course, it would be even better if there were two points I could click and drag around the scene editor rather than having to set the length and rotation separately. I feel this should absolutely be possible, so I might come back to it later, but for now this is a nice improvement.
Today, I plan on getting some art in a rough draft stage so I'm not just playing with debug colliders as visuals, and I might get a prototype implementation of SegmentManager complete.