well bro i had the same thing happen on my ntc3...try to find a dremal..if you cant find one ask around for a friend with any kinda drill press...if you cant find one from a friend look in you phone book for machine shops and tool and die shops in your area if you bring it to them they can get it out...normal for a small fee (ie) 5 buck or maybe free???..also if all els fails put a sma;; amount of J B liquid weld in screw head and stick old wreanc in and let it dry......id try the machine shop they mite be able to help you in the future