I tried to perform this operation, since the top cover got a scratch and a ding. I bought a replacement top cover and tried to reinstall a perfectly working screen from one cover to another. I followed this manual to step 2 and realized that top is easy, sides are much harder. On the sides with the opener tool you start to touch directly the screen glass so the “slowly twist“ move suggested in this manual would likely create cracks in it. Finally I decided not to execute this procedure since the risk of losing the screen is too high. In case you replace a broken screen - then it is ok.