On mine the actual screen came out of the bezel. There seems to be a foam gasket in there, but no adhesive on it or the edges of the screen. Any suggestions how to reattach securely that won't damage the screen (which is working perfectly after I re-seated the loose connector)?

Easy-peasy. Joy-Con now works while disconnected again. Thanks, ifixit!

Any comments on how to position the charging coil contacts on the new battery? I did my best, fully extending the ribbon cable and making sure it was straight. Not sure if it works or not - it didn’t work, but then again, it didn’t work before I replaced the battery so it may be something else, or the charger.

Otherwise it was easy enough. Hardest part was getting the back cover off, especially where it was stuck to the flexible parts of the chassis and at risk of tearing a ribbon cable. The back certainly flexed quite a lot in the process, but once off it returned to its original shape, and was easily re-installed. Didn’t seem to stick on as well as the original adhesion; perhaps some thin 2-sided sticky tape would help if you keep your phone “naked” but mine is in a case so I’m less concerned about how well the back sticks.

Thanks for a great guide, and for it NOT being a video without written instructions and still photos (as many are). A video as a supplement is great, but as the only reference, it sucks.