Beginning with this tubey chair, I started to see a trend in tubey furniture. That became a theme in my ongoing experiments with Fusion 360. Here are a couple excerpts. Abstracting forms with single lines like this has been fun, but Fusion's 3D sketching tools are really limiting and my institutional licenses to other CAD software have lapsed in my year in absentia. Open to advice on how to better 3D sketch in Fusion, or if other free software might work better.