Picked up some OE iron sights for my vintage 22lr rifle, unfortunately one of the screw holes already has a resident (aka a sheered off screw) in place. Looks like its approx 3/32-5/32 inch in diameter so its pretty tiny. Local range estimates $20 to drill it out which seems pretty reasonable to me. Only thing I would be tempted to do first is to drill it a little by hand and tap a small torx bit in place to try and unscrew it. Thoughts?