It was kindly pointed out over on Western Thunder that I had the drivers brake valve upside down and that it was too close to the centre line of the engine/heat shield. I measured it up and compared it to the Wild Swan drawing and sure enough it was 0.9mm too far inboard.

As you can see I had made a small brass bush to reduce the size of the hole but moving it gave me the chance to re-drill at the right size for the brake valve stem.

Here we are nicely aligned.

As you can see I have also made a start on piping up the steam fountain.

The brake valve is piped up the right way up now too.

I had to remove a section from the inside edge of the heat shield to allow pipes to pass through it. The pipe at the side is one of the two main pipes coming down from the steam fountain and one thing that stands out on both drawing and photos is that there is a chunky union on the lower section.

These are the parts that will make up a representation of those unions.