I'm an Electrical Engineer with a Master's of Engineering and a frustrating piece of a Ph.D.
The best advice I can offer following this repair manual is to read all the steps carefully prior to disassembly / assembly. Go at it carefully and methodically. And refrain from caffeine a few days prior. It really sucks to drop a screw inside the case at step 18.
The instructions mention a T6, and T8 screwdrivers. The “Buy these tools” link to T6 and T8 security screwdrivers. There is no mention of the security version of these screwdrivers required. Can someone clarify?
Step 0: Lay off the coffee or caffeinated beverages at least twenty four hours before attempting any of these manoeuvres.
Overall, the process was easy to follow. There are a few steps where you can ruin your device. Closeups would have gone a long way to make this even easier.