Excellent clear instructions. On my MacBook the cover screws were marked on the threads with white for the long ones and blue for the short. Since I couldn’t source a replacement speaker I repaired the existing one using contact glue as described by Earl Maliki on YouTube…it works; no more rattles. The sound is now lo-fi for the left speaker but good enough for speech and I never listen to music without a Bluetooth speaker. Total cost: 24 Swiss francs for a screwdriver set with a P5 pentalobe head. Much better than the 167 fr and 2 weeks in the shop I was quoted locally for repair.