Note on the screw template - Step 20 should be Step 22, and Step 22 should be Step 24. I also used Scotch Removable Double Sided Tape to hold the screws to the screw template page. Really did the job!
The "washer" that a few of the commenters have mentioned isn't a washer nor a broken post. It is a circular nut that helps the WiFi antenna get a good connection to the logic board. It is part of a sandwich: 1.4mm screw head logic board ++ circular nut. I held it in place with tweezers and then screwed the 1.4mm screw in. Don't lose this nut!