4/4/2020 - I replaced the battery to my mid-2009 MacbookPro earlier, and so was comfortable with the early steps. Removing the battery and all the screws went well. Detaching cables was easy, but reattaching them was tough. Specifically, step 32 in reverse was the most difficult part. I recommend applying a new piece of electrical tape once you reattach the cable to keep them together. Otherwise trying to reassemble the lcd was impossible for me. I also had to extract the cable and re-thread it, attached to the lcd, clip side through the metal case. Once it was through there, I spent a few minutes delicately cleaning the lcd and the top screen. Ensuring everything was clean was also challenging. Re-assembly afterwards went well. Right away I turned on my computer and my screen was perfect. Coupled with the new battery and a round of Clean my Mac, and everything works perfectly. All the steps are correct, and this took a couple hours to complete.