I have recently made a model of an electric shunting locomotive for O gauge. This is powered by a postwar No. 1 clockwork motor that directly drives the wheels. These wheels have been made from the modern meccano 187c plastic wheels cut in half and ribs filed off. I wanted to make something which could run on my wall mounted O gauge track. A link to a rather poor quality video is given below. I cannot make a better quality video as I have to stand at a height and the camera is, therefore, not steady.