Having just read through this thread in it's entirety (I should be hard at work), I think I'll give up kit building now, before I've even started (and I've only got a class 47 diesel to modify)!
How you can make something so precise, including fabricating your own scale size parts is completely beyond my comprehension and I take my hat off to you, and everyone else who possess such amazing skills. Being 49, I grew up with diesels and electrics so steam is not my cup of tea but I cannot help but love this article and the brilliant model you've made.
I'd like to say that you've inspired me but I'm now even more convinced that I'll stick to RTR!
Well done that man!
Mike