Doing this model for a second time I realised that much of the detail on the wheel bogies will not be seen once the skirts are attached and thus were omitted. For the track construction I glued them together with the help of a balsa wood jig. For the curved sections I bent them around the idler wheel and sprocket until the glue set. There was no need to assemble the top track run. I left off the track to allow ease of painting for it and the wheels.