I have a S&W 686,65LS, 640, 642 and 442. I would like to know where I can find the proper screwdrivers (or screwdriver set)for the sideplate without damaging the screws? I did take the sideplate off of my 686 13 years ago and it still has the muddled up screws. Since then I have never tried taking it off (to clean or oil) my other S&W's because of fearing messing up the screws.