Thanks fellas - the build was a lot of fun and had been fermenting in what passes for my brain for a few years now.
Frank - I cast the side frames in aluminium, quite some time ago. Still have the pattern and one 'bad' casting here. Somewhere on this machine, I have pics of the castings, patterns and machining (done mainly on the Douglas shaper) - when I find them I'll post on the build thread. Like you, I like engines that look like they have been lifted right out of their working environment - not that I don't appreciate all the spit and polish that some people put into theirs - and that's what I try to achieve. It probably helps that I'm the worst painter in the world!