I spent the afternoon today modeling these 120 roll film spools which came along with my two oldest box cameras. The cores of the spools are turned wood, and the end caps are stamped sheet metal.
I needed a break from working on my latest airplane. Some little alignment errors have proven difficult to correct, and I'm not sure if this one will ever fly. I did learn several new SketchUp techniques in the process, however, so I still feel the time was well spent.