I realised that the boiler top-plate and four superheater rings were all tightly fixed together by their mountings. As a result, I was having to cajole each ring against the wishes of the rest of the rings.
By loosening the fixings, each ring could be adjusted independently of the others and of the boiler top-plate leaving much more slack to play with.
So after some careful height adjustment with the sky-hook, here's the result.
|Regulator and superheater connection (1)|
|Regulator and superheater connection (2)|
|Steam feed manifold (1)|
|Steam feed manifold (2)|
|Steam feed manifold (3)|
If you are still wondering about the skyhook, click here!