I’m sure someone can correct me, but this is my experience. The 1.7 mm Phillips #000 screw in the top right might be demagnetised for a reason. When I tried a magnetised screw in that position I found that I got a distinct yellowish tinge on my screen in the same place. So I removed the screw (couldn’t find the original as it disappeared off the face of the earth!), and re-assembled the phone without it.
Don’t have any problems as far as I see having only 3 screws holding the bracket down…