I recently did this. Some things I would amend however.

In step 2, when the battery is unplugged push the power button 3-5 times and hold it down for 5-10 seconds, just in case the capacitors are still holding charge. This might be what happened to the user who had his device short.

I left the coaxial cables attached, in step 3, and just removed the screw holding in the Wi-Fi card, moving the whole assembly aside.

Also in step 5, I had issues with the power connector. I had to redo the connection several times before the device turned on.

It's not mentioned anywhere, but you should definitely have a small brush ready to clean the fans. If you are scared of doing the re-paste, cleaning the fans out may do enough to get you by.

Lastly, I used 3.5g of Noctua NT-H2. I was nervous that 1g of paste wouldn't be enough, and I think that was a good assumption. I've seen several posts/videos that suggest using K5 Pro on the VRM's, it doesn't appear that's needed, but we shall find out.