Cheers to those who put this tutorial up. Followed the steps, worked perfectly!
Point to note:
The very end of these pentalobe screwdrivers can be very thin and sometimes a weak/cheap metal is used to make them.
IF you're pentalobe screwdriver "strips" at the head (NOT the screw itself) as you're taking out the screws, don't worry, give the very tip (straight-on mind-you) a quick pass in front of a grinder or hasp to in order to remove the rounded off edges and make it flat again!
Worked like a charm for me.
Again thanks for the advice!