Photo: Ian Johnson
Steam And Things started this valve gear as a special commission in 1/4 inch (1:48) for a scratch builder. Since then the project has been upgraded,assembly notes written and is available in 1/4" and 7mm. The gear has been etched in 20 thou (0.5mm) nickel silver and is made up from approximately 86 parts.
Photos and drawings: S&T
Model R. Hill, Valve gear etches S&T, photos I. Johnson