Tony,
I know you're not moanining and I wasn't criticising your work, it was just a bit of fun really in that with such a reasonably small class of locos there could be so many variants. I would not dare to criticise your models in any shape or form.
As you say the Yeadon books were not around in the past and information was far less available than nowadays.
I haven't put the small step on the fireman's side bunker on my C12s, simply because with lining I don't think there would be sufficient room for numbers plus step, so mine are inaccurate.
Regards Pete