Amid the drugged-out, crash-and-burn end to Ozzy Osbourne’s original tenure with Black Sabbath, David Lee Roth found himself pulled into the centre of the Brumie heavy metal pioneers’ engulfing drama. The year was 1978, and the world of metal was at a crossroads. Black Sabbath by this point was a spent force, long past the former glories of their dark blues attack conjured so thrillingly on the likes of Paranoid and Sabbath Bloody Sabbath. They …