The technology for 3D printing has been around for many years but now has a rapidly expanding market among hobbyists and home users. 3D printing machines are now affordable for individuals or modelling societies and offer the opportunity to design and build bespoke parts of a model, or even create an entire carriage, wagon body or station building, through an automated process rather than construct them through traditional methods and materials or buy them off the shelf from a manufacturer. The authors take readers through the principles of 3D printing; the benefits to the railway modeller;...