Phil
Thanks. I will go back and look at 1950s photographs of the 15xx loco.
I am very aware of the build log on Model Engineering Clearing House. It is not complete, stopping when the writer became aware that Speedy was NOT a model of a 15xx loco. He made so many changes to get to look like a 15xx that bits fouled each other. He then started the build of a 5″ 15xx from scratch which, I believe, is still progressing. It is all in the admiring chatter.
Partly because of this I decided to ignore internet blogs and just follow LBSC, Don Ashton, Jim Ewins and those who have built and run Speedys. I am solid modeling the loco as I go. I also know I will never finish it.
JA