Here is my second attempt at making one of the joints for my 19th century robot. This is the knee, but the joint will be more or less repeated for the elbow. In balancing realism with simplicity, I thought one thing was super important: don't require the gears to support weight. There are a few things not right, and I know it. First and foremost is that nasty sharp edge right where it shouldn't be on the, umm, thing with a hole in it. I think I'll also get rid of the two nuts on the U-shaped thing and replace them with washers or padding of some sort (cork?) to prevent the lower section from sliding around. I was also disappointed that I couldn't quite make it under the 5000 polygon mark. Close, but not quite. I've been stewing over the fact that there doesn't seem to be any way that the gear was slipped onto the U-shape in the first place. Assume that the U is in two halves that screw together in the middle!! I welcome any comments, suggestions, or ideas for the next draft!