Which screw driver is required to open a casing of a G4 aluminium powerbook 17 inch 1-667Ghz . I am very concerned I may strip the head since a number of people have said a lot of torque is needed to be used. I bought a Phillips #0 and a #00. Ifixit tell me #0 and others who have done the removal ,posted on the internet, tell me #00 I tried both fittings and i am not sure how much movement should be or how deep the screw driver should sit. I could easily convince myself it was either from inserting both.