Factory painted Atlas U23B shell on Athearn U33B dummy chassis with P2K AAR-B trucks. I wanted a dummy unit and already had this chassis and trucks on hand. I sanded the details off the Athearn fuel tank and added a sight glass and fuel filler harvested from an Atlas B40-8 fuel tank. I also replaced the Athearn air reservoirs with some of my Hexagon Models 3D printed GE reservoirs. I drilled out the coupler mounts for 2-56 screws and used Atlas coupler boxes with some dummy Glatzl couplers. The decorated shell was a cheap ebay find. I used Model Master Blue Angels Blue and RLM Gelb to approximate the Atlas blue and yellow.