Things are a great deal more difficult when working with the three UNDER the door, that hold down the top case. It's so easy to crossthread them because you have to put the screwdriver in at an angle and there's nothing to hold the screw where it belongs. (and it's having to hold two pieces together, that are already skewed in a bad direction)
I've got an extractor I've had to use on several occasions after a customer crossthreaded and jammed one of those screws. (no idea why they were taking off the top case)
