I've done some more soldering of sander assemblies, but they're not going on until the running gear is in good working order. The engine truck needs some work. There's no clearance between its rear wheels and the first drivers. That's relatively easy to put right with a drill and some 6-32 brass washers. The pivot for the trailing truck is also under construction.
In the background are the furring strips that will ultimately support the benchwork.