I used this guide with the ifixit replacement kit and it went very well. I do wish though that the guide gave advice on how to install the new adhesive gasket when reassembling.

What a world we live in.

Me too. I had two longer 4mm screws here, and one 3mm screw. And I didn't pay attention to what holes each screw came out of. I put them back in a random order and it seems fine.

Because this step requires some force, make sure to double check that you got all your screws out. I finally got my gumption up to apply the necessary force required to pull up the upper case, and after 5 minutes of pulling, I look and see that the reason it wasn't coming up because I missed one screw. Ugh.

Also, before you just shove your hands under the upper case, prying about, think twice: I cut my finger pretty bad on a sharp piece of metal.