When I lifted my screen during this step, the metal LCD shield plate did not come out with the screen. Very confusing. I needed to carefully pry around the shield plate's side notches, just inside the walls of the iPhone's back, in order to lift it out. Required a trifle bit more force than I anticipated.
This was an awesome and clearly understandable guide, helped by color-coded circles for the various screw sizes! I disassembled, replaced the top and keyboard and reassembled in less than an hour, with my son watching over my shoulder. Well done!