Also works on the Garmin Forerunner 15
Step 2 - The red seal can come out with the back - carefully place it back into its slot in the body of the watch before reassembly. It only goes in one way. Not sure about turning it over to be ‘face up’ as the springs will fall out. Move onto step 3 and tape them, etc.
Step 3 - you can tape the springs, but when the motherboard is removed, they can fall out the back. Consider carefully removing them first and setting aside in the matching pattern for easy replacement
Steps 4-6 - all good, but don’t bend those metal clips too much…
Step 7 - consider taking the tape off the front of the battery (+ side) as well and moving to the new one
Step 8 - reassembly of motherboard - carefully compress each corner and feel as each clip ‘clicks’ back into place
Step 9 - place back in housing, making sure it sits level
Step 10 - replace back of watch - a few careful jiggles may be required as there are 6 different springs to get touching at the right places.