I don't pick on this bloke any more than the others, as they all tend to be indistinguishable, but Dean Margetts was on Adelaide Radio a few weeks ago, where he was introduced as "one of the best in the business" .
The audio clip is probably still on 5aa Sport archive, but not spellbinding listening, however, when asked towards the end of the interview about which game he thought he had an absolute shocker, he had no hesistation in choosing a Derby from a few years ago (Cousins name was mentioned to narrow down the era) where he admitted that he made about a dozen really major mistakes.