[Hugh]

Don,

I got this suggestion from an old gunsmith: buy a cheap screwdriver and grind the blade to fit the screw slot. Make the sides straight, not beveled like most commercial non gunsmith screwdrivers. Cut the handle off with a hacksaw and mount the screwdriver in a drill press. Place the screw under the screwdriver, and lower the drill press (NOT RUNNING) until the screwdriver is in the screw slot. Be sure that you have the frame of the gun backed up against something to keep it from turning. while applying downward pressure with the drill press, turn the chuck BY HAND to unscrew the screw.