boomer700

If the sides of the screw head are exposed you could try a small vise grip wrench and turn it manually. If the screw is buried its a lot tougher. Take one of the screws you got out and bring it to a hardware store or machine shop and see if you can get a back out tool. You would need to get a drill bit SMALLER than the inside diameter of the female threads and drill a tiny hole into the stuck screw. Then take the back out tool ( it looks like a drill bit but the threads on it go the opposite direction). And insert it into the tiny hole you drilled and turn counterclockwise. You might have to try it a few times because you don't want to drill too deep or off center of the stuck screw. Please just take your time. Good luck.

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