3 the you tube video dude was lucky not to have his two Central batteries adhered . Mine were stuck fast.
4 don't forget about the two small T 5 screws to the left and right of the battery head board, just below the main battery connector.
5 the Track Pad sits behind the two central batteries. The batteries are adhered to a flat plate that protects the Track Pad which is pretty resilient. You can do the cheese wire trick without cutting through anything you shouldn't. However be careful if you're using a spudger or other tool between the two centre batteries at the top of the T. This is where the Track Pad connector (its very flat and exposed) to the motherboard.
6 seems obvious when it's written , but you will need the adhesive remover if you are interested in removing the adhesive. It's a work out.
If you're taking the shortcut (nylon, wire…and no adhesive for battery removal (you'll def need to remove the adhesive once the battery pack is removed) things to note:
1 The adhesive may still be pretty strong. Mine was and I broke several wires trying to do the cheese cutter move down the back of the middle two batteries
2 if you're cheese cutting through the adhesive, when you get to the base, don't go too far. I did and severed the battery cell connector… disconcerting puff of smoke.