Building a Sperry Rail Service (SRS) Testing Unit. Using a TOMIX 40 Diesel Rail Car shell (double cab car, but was unpowered), and KATO RDC4 powered under carriage. SRS decals from Circus City, and Walthers. Minor filing at ends of shell to accept KATO frame. Will DCC with DN 143K2 Decoder. Painted frame and trucks flat black. Body shell painted with RUST-OLEUM rattle cans (shell Tuscan Sun Yellow and roof Aluminum). Will paint out some side windows. Roof appliances from parts box. Not exact, but SRS uses a variety of units, so close. Simple project, and at home on every layout.