I finally had the HB fail. Bolt broke off, and balancer left the sleeve on the crank. wasn't broken off flush, but close. upon inspection, I believe a p.o. used a junkyard balancer (yellow paint pen mark inside the pulley, and bolt had rounded corners). I didn't want to have to take everything off, so I decided to drill length wise, and hope for it to split. Drilled about 3 holes and it worked. I'm afraid that I hit the crank, and left divots. not real deep. Wondering if that is going to be a serious issue. Also, what is right behind the balancer? I may have gone too deep on one hole. Hoping if I did, it isn't going to be an issue.