I've been in touch with another club member and he remembers Glyn building the boiler with another member Ron Maddocks:- its an experimental boiler for Juliet with a deeper fire box to try and increase the efficiency. Glyn was the clubs boiler inspector for many years and I'm sure they would have the fundamentals of the design correct by the looks of it they tested it as well but the boiler was never stamped up, the years caught up with these two wonderful model engineers before they could complete the project.
I'll give the boiler a good check over to ensure that they got the design parameters correct and give it a shell test and stamp it up with a number and offer it to another club member who I know who is building a Juliet, if they don't want it would any of you guys be interested ?.
Stew