I decided to have a go at two unusual wagons and expected challenges in metal working, making a few unusual shapes and the suspensions. The “large” one has 3 bogies with working swing link suspension, shown under construction in the photo, and involved fiddly machining. The “little” one is a wagon with iron boxes for carrying coal used on the Taff Vale Railway. This required not only using very thin metal but also dealing with a narrow underframe – distance between the solebars being less than the width over the faces of P4 wheels. So I ended up with CSB suspension, 3D printed wheel centres (7 spoke!) and narrow tyres. Having at present only a bit of straight track, I’ll have to wait for the end of social distancing to try them on a layout and see how good the suspensions are.
Full details of the construction are on the Forum.