Just picked up a 20" Mossberg 590A1 for a song. The only problem I have with it is that the safety is a real bear to move. I am replacing it with an oversized one from Vang, but the screw that holds it on is one of those "one way" security screws and it is recessed about 1/16 to 1/8 inch. Does anyone have any idea of how to remove the screw without buggering it up? I'd like to re-use it if possible.