Ah, I’m using a Mac, so maybe the image cut & paste works differently. I did get a green “+” when I tried to drag the screenshot, which indicates a successful copy, but it didn’t appear.
I was careful to hide the sash elbow and check all the corner edges, including the one that arrow is pointing at. I’ll go back and check again. I also merged vertices after you did the extrude-normals in the video, and two were removed, so I don’t think that’s the problem. I’ll tinker with it some more…
