Don Gage and Bob Baxter decided in early 2005 that their kitbashed and scratch built models would best be shared with others by building a modular layout to display at model train shows in the Southern California area. For the most part, their trains and scenery represent old time narrow gauge railroading. They agreed on a dogbone shape that would provide a 360 degree viewing range. Hollow core doors were chosen as the basic modules. This, of course, led to the obvious choice of the name, Door Hollow Shortline.