buddy has a s&w bodyguard with the older interlight laser....battery needs replacing, but the tiny screw is stripped.....don't have any taps that small......have tried rockset and a bit to no avail....I think there must be some type of gun cleaner on the head....tried to clean it with acetone and alcohol....still no good....any ideas?....last effort is to drill it out and replace it with a crimson trace.....