Everything went well with the repair and the guide was tremendously helpful. Just a few caveats I’d like to add:
1. The old battery may REALLY be stuck down on to the case. Go VERY slowly when prying it out.
2. You will have to remove the screen, regardless whether or not you need to replace the Force Touch sensor. Prying apart that metal clip which encloses the screen cable, is a royal PITA…just be patient.
3. The adhesive ring to reseal the watch is quite flimsy to handle. You’ll have to be very careful lining it up properly. And make sure you really clean the surfaces with alcohol and let them dry thoroughly before applying the new adhesive ring.