To All: I had a Proto 2000 E unit I was not using equipped with DCC and Sound. I used the cab and chassis for the front end and installed a SP  round end observation passenger car behind the cab. Entrance to the passenger end is through doors behind the cab and then along a corridor. The E-Rail Car usually pulls an Express car and a EStLRG Baggage/REA/RPO car. I will run this outfit on the HO scale layout of the First Coast Model Railroad Society. Photo by Elvin Howland. Yours, Elvin Howland/E. St. Louis Rail Group Layout.