Ok, One of you guys could have some fun with Photo Shop. Take #10 remove tank and stretch the frame. Modify a coach section and add to new long frame. Put a flat water tank under coach section. Put a small coal box on front of coach section. Thus you have a steam power "Maine Tea Pot" (LOL). Or, just take a Henschel tank engine and add a coach section. The big roads did it and called them inspection engines, a coach section on the boiler.