I've not made an etched kit for a long time, so what better excuse to dust off the RSU than to put together one of Stephen Harris' kit for the 13T All Steel High.
http://www.2mm.org.uk/small_suppliers/stephenharris/index.htm
The etched contains everything except; vacuum cylinder, wheel sets, axle boxes and buffers.
An interesting process is making the chain link dimples in the side of some wagon diagrams. This involves a 1mm punch and
