If a man can not accept this then he is not worth doing business with. A man that stands behind his work speaks volumes of his character and knowledge of his dogs. Not saying just because a man does not guarantee a pup he is not a good man or doubts his dogs there are to many out there that will try and pull a fast one on you and lie about why he wants a replacement.
As for the original post I see no point in adding more to the replays that have been made there has been some good knowledge laid down here take it.