Hi Alf,
You are right of course, but in one way not right! Yes, the Yarrow Boiler I have in mind for now is a bit smaller than the one you built, but the ultimate goal is to build one about that big for exactly the same purpose but probably not with a Stuart Swan as they are not now available, I think.
I would be delighted to receive fuller details plus hints and tips – perhaps you could be so kind as to e-mail me rather than take up space here. The lack of drawings are not a problem as I can attend to that – I have an ancient copy of AutoCad LT and enjoy using it! Your photos are really super – the boiler looks really superb during its construction and the photos have already conveyed quite a bit of information including the temporary structs to hold the water and steam drums apart during the tube fitting process!
Look forward to hearing from you in due course,
Kind regards,
Chris
(a retired sea engineer!)