Fixit sent the right Screw Extractor Set but...

Mein Problem

The pentalobe screws refused to come out

Meine Reparatur

I had read somewhere that Apple may use Loctite to insert the screws. I researched on the Internet how to loosen up Loctite. The answer was to use HEAT. I heated up the screws, using my glue gun nozzle (without the glue, of course) and when the screw was hot, using the Fixit screwdrivers, the pentalobe screws came right out.

Mein Rat

Yes, heat up pentalobe screws before you try to remove them and strip out your screw heads and screw drivers.