I had issue with the brand of the screwdriver. A cheap “iphone compatible micro crosspoint” screwdriver removed the outer screws with grace, but it started stripping the home button screws. Same happened for some other Chinese brand precision driver collection with PH 00 and PH 000. With one last hopeless try, I found another PH 00 in the shed (it says Japan, but no clue what the brand is), and the stripped screw unscrewed at the lightest touch. I believe it's not tightened hard but we've been using a poor screw driver without a snug fit. It's extremely difficult to tell if the driver is any good until you try it. Visually comparing the good and the bad driver I can't tell any difference at all.