I purchased a set of hex head grip screws from Beretta. When installing them, suddenly the head broke off of one leaving the threaded portion in the bushing. Sheared off almost flush with the top of the bushing. How the hell do I get it out? There isn't enough for a pair of needle nose to grab. I've tried forceps, even wire cutters, hoping I could get a grip and so far, nothing has worked. Thoughts, wishes, prayers, curses, voodoo, etc. are welcome.