A few years back Keith T had a go at one, not sure how far he got though. He did a bit of a thread on it somewere
Ahhhh here it is
https://www.gscalecentral.net/threads/occré.299817/#post-329196
Nemo Ye Gods! What a memory, remembering my posts.
I am sad to say that I have not progressed much further.
Two main reasons, the first being that I found it near impossible to get the gears to mesh in the tender drive, the second is that my close vision has deteriorated more and have found it difficult to make much progress. Also, I found that there is a v nasty wobble on one of the drivers although it doesn't foul the frames and thankfully the frames help to mask my poor assembly.
All has not been lost though, the part finished boiler on its frames makes regular appearances on workshop siding of the NWGScale portable layout Coal Valley Mining and gets quite a bit of interest. "Wots that?" Is the usual query. They do say that any publicity is good publicity.

I must revisit it and at least mate the tender with the boiler.