Finally finished...23x23 inches of HO goodness. It's non-functional but was definitely an education in scenery techniques... An overhead plan view, showing the general track plan from above. Three views from the corner showing most or all of the diorama. Close-up of part of the roundhouse and turntable. Close-up of the turntable and water tower. Close-up of a workbench and workers on one side of the roundhouse.