Just a heads up. If you are having problems with the screws stripping out you need to try EzGrip. On any fastener or screw/bolt that im having trouble getting out i use this stuff.
Im an Aircraft Mechanic by trade and i use EzGrip daily. Just a little goes a long way. Take a look, well worth the investment and it keeps forever if you dont use it right away.
EzGrip :: screw extraction, friction drops, screw removal