i thought the fix would be similar to when you break the bolt off when torquing the tires? if this happens, you can't just 'extract' the bolt out. don't you have to push the bolt out so it would come out from the other side, and insert a new bolt? i would think you would do it a similar way for this situation, but i have no idea what it looks like in (or behind) the booster. i can't picture how you would get a new bolt in there with your description...