A 158-page book covering the construction of 4mm scale locomotive chassis for many different types of locomotive. All parts of the chassis are dicussed and described with major points illustrated with photographs and clear diagrams. Solid chassis designs start the book, then bogie and pony trucks are introduced, including tips of ensuring your model locomotive remains well balanced and able to negotiate changes of curve and grade. Iain then moves on to describe compensation methods before rounding out the book with a description of chassis deatiling, including cylinders and valve gear.