Hello there, I'm looking for some help. I am planning on doing this "procedure". I have the 54 Bit Driver set from iFixIt. If I have to unscrew the 8.6 mm Phillips screw and 3.9 mm Phillips screw. What bits should I use from the 54 Bit Kit? The PH1, PH0, PH00, PH000? I really don't want to strip the screw, which one should I use?