Haha, never thought my favorite band would crossover to this forum. Likeness is pretty great so far, though I'd say he has more hair on his head - something you're hinting at with the background, but isn't obvious at first. His posture is also not as good as your rendering, which is probably due to his hunched-over "live stance" that he's been doing for years. Or maybe the bad posture came first. But in any case, I think it's an important part of his likeness.