If it is true that the second revision isn't as bad, and it often is successful, then I might give it a go. I would still have Berven do it. He knows what the situation is, and he would be honest at taking his best shot at fixing it. If I had hardware failure or pseudarthorsis I would fix it. Fixing the posture is not a local issue, but involves the entire spine. I need osteotomies, and that is a big surgery. I had only pedical resections in the last revision, and that was a horrible ordeal. I can't image it being worse, but it always can be.