Well at least his high res pictures are good for reference if nothing else, particularly the die cast 750K0 because John Wyatt restored it originally. I saved all of the ones for the sandcast and will do for the diecast.
I think it's good that DSS are repro'ing lots of 400/4 parts .. everyone young and old should own one, at least once in their lifetime. I had 4 of 'em (still have one) Brilliant little bikes and you can pick them up at reasonable prices still and they don't apper to have sky rocketed in price ( unless Frank is selling them). The guy at Oxford Classics seems to to have honestly described bikes at reasonable prices. Not bought from him myself personally but deserves a mention on here.
Cheers ..... AshD