While most roads had one major backshop, the prototypes for the Walthers Cornerstone Machine Shop allowed railroads to make repairs at outlying terminals since it was often faster, more cost-effective and got the locomotives back on the road and earning their keep. As new engine terminals were built, most received a machine shop capable of handling just about any type of repair that might be needed. This kit matches the design of the Modern Roundhouse (933-3260, sold separately), and can be built as an attached or freestanding building. It also includes a boiler house, which would supply steam, electricity and compressed air to the entire facility. Large roll-up doors can be built open or closed, and the baseplate of the Machine Shop kit has slots that accept popular rail sizes.