I tried to post a comment on the Southsiders blog, but don't have the necessary accounts to be "verified". I'll post it here instead.
Overall a very interesting article. Two minor errors are in it. First off, the "Dominators" came in 500 and 600cc models. When the 650 was developed, the name of the bike was changed to "650SS", still using the Featherbed Frame. My ride-to-work bike was a rather tired company 650 SS. I think it was a 1963 model, and in 1967, it had over 100,000 miles on it. Still ran very well.
The second error pertains tio the street where the Wolverhampton factory was located. It was on Marston Road and was the site of Villers Engines, who made all the small two0strokes that powered so many of the small British bikes in the 50s and early 60s.