Yep. Bought one at the suggestion of a previous post in this thread. No dice.

THe bit is too long. THrough a lot of effort I might get everyting IN there....but theres no room for the bolt to loosen/turn. My best headway came from hammering the end of an allen wrench. But the bolt is now turned to a point where the allen wrench can only be oriented in a way that I can't easily hammer.