Never having been a cutter & shutter. it is too much effort for so little achievement if one ends up with a compromise.  I considered the simplest way was to etch them, which is what I did. But I started with the Midland-built variants started by Reid around 1922 and moved onto LMS Period I stock afterwards. Once the chassis had been etched, it was only a matter of etching different 57' bodies. The real coaches were designed to use standard components and production did not cease until 1930.