Dr. Muff has been collecting brass model railroad equipment and modeling in HO scale for over 50 years. He has a large home layout with a focus on passenger railroading from the late 1940's to the mid 1950's. The center piece of the model railroad is a scale recreation of Kansas City Union Station and downtown Kansas City. The stage for the model railroad is set by a full scale F-7 locomotive cab and a ACF passenger car mock-up. He enjoys CAD drawing and over one hundred of his articles and plans have been published. He is a member of the National Model Railroad Association and several historical societies. For twelve years he has been involved in research, drawing and production of fine-scale HO brass models of steam and diesel locomotives and passenger equipment of the Mid-west. He is a Radiation Oncologist practicing in the Washington State.