Thank you for the guide. I do advise against removing the 6 Philips screws attaching the trackpad to its hinges as described in Step 8. They simply don’t have to be removed, unless you’re replacing the trackpad.

My 2013 11” Air’s trackpad had started rattling after a battery swap and the noise drove me positively nuts. The trackpad does feel as good as new now. I used a ~1mm thick double sided foam tape instead of EPDM, hoping that it’s robust enough to last.