It's been quite some time since Eric's original development of these castings. I am, as far as I know, the only person so far to have built a model using some of these castings, so out of interest I thought I'd post an update.
I can't remember exactly when I took delivery of the castings but I think it was around 2016, but in fact it's been about 3 years building as it was shelved for various reasons for about a year.
Around the same time as I restarted the project, I learned CAD design and so for the remainder of the build I often didn't use the castings as it was easier to fabricate to ensure good fits and more detail. The wheel castings and cylinders were in the end the only ones to be used, with some modifications made to the cylinders to improve faithfulness to the prototype.
Only the pipework remains to allow it to steam. It runs smoothly on compressed air. Some photos attached and hopefully the short video uploads, let's see.