Wow, 2018 since I last looked at this. No wonder Chris is muttering.
Any way I picked it up again yesterday and I started by making a couple of replacements for castings and turning the tank vents so that they at least sit flat and vertical to the tender top plate.

These are the water scoop dome and brake cylinder. The latter is oval in shape and the former quite badly pitted.

Replacements machined and since this photo was taken fitted.