22kane

I don't specifically have a B23-7 but I do have a C30-7 in Burlington-Northern's green and black colors. It's basically the same locomotive but with 6-wheel trucks instead of the B40-8W's 4-wheel trucks. the trucks on my models are interchangable so you could easily get the configuration you want. Both designs are on Railbrick's site; http://railbricks.com/build-instructions