Anyway, I'd just done some work on the XML an' all... maybe it was a waste of time... I only caught up with the recent discussion when I came to add the latest pic:-

it'd probably need the station circles to get even bigger, and a couple of numbers need to be tweaked.
I wonder if I'd get anywhere by phoning TfL up? (thanks Matt!) Declare our love of the map and that this could only be good publicity, or something...