Dura Ace Cranks, fucked?

Cheers Fred, both the BB's I've tried are JIS accordning to Sheldon (Shimano and Ritchey), attached are a couple of snaps including the comparison with the drive side which I think shows significant enlargement.

I think 'fit for purpose' only applies to business sellers, I'm sure private sales are caveat emptor. Still, nothing ventured!

it applies to anyone doing distance selling, as you cannot see them it is there responsibility to point out flaws. This has happended to me before, all you need to do is threaten action in the small claims court and he will only be too happy to give you a refund.