HARDtalk’s Sarah Montague speaks to Duff McKagan, a rock musician who nearly drank himself to death. He's one of the founding members of Guns n Roses - the rock band who became as well known for their bad behaviour as for their music. For McKagan that stopped when - as he puts it - his pancreas exploded. It prompted him to sober up, go to university and to start his own wealth management firm. How does a bad boy of rock become a businessman?