I contacted Nick Hall and got two cordial replies, both of which ended in a long "standard" disclaimer stating that the info was for recipient only etc. Therefore I cannot quote directly here. However let me say, as a very indirect interepretation, that he has no comment on the lock itself, and would not comment on something he hadn't examined personally. He regrets his other comments, supposedly quoted here, may have been mis-interpreted.
I suggest we leave Nick out of this discussion beginning now, as he's limited in what he can say due to his official position etc., and definitely does not want others quoting him in online discussions.