So I added a saddletank and firebox in the same fashion that I had built the smokebox. I then added cab sidesheets fabricated from 0.5mm plastic sheet. By painting everything black at this stage I can get a better idea of what the finished model will look like; also any bits that don't look right jump at you that bit more at a stage when it is easier to put it right.

The postman delivered a small package this morning containing etches and castings from RT Models (thanks for telling me about them, 46444!)- chimney, saddletank filler cap, safety valves, smokebox door, springs and spectacle surrounds.

So the next stage will be to fit the boiler fittings, and then start drawing up a spectacle plate.