Hello, Recently I discovered 3D printing and began to develop N Gauge scratch-aid kits for my fleet.  Made publicly available via https://www.shapeways.com/shops/newman-miniatures and with several scaled up to 00, I gained particular interest for my recreation of the iconic Titfield Thunderbolt.   I've started this thread (being new to RMWeb) to discuss potential future prototypes to design, particularly from the pioneering Era 1.  Nothing is guaranteed, commercial chassis and wheels always