My main line train continues its progress, and has now finally been able to open her throttle, on the upper level of the humongous West Penn Model Railroad . There are many towns and cities and Factory complexes on this upper level, where much of the operations takes place. But there are also two different levels of tracks, so if you have to work the main, you may definitely be locking traffic, but something might still be moving somewhere else! | Reading and Lehigh Railroad, N scale