
I must say I feel tempted to do it.
After all, I do have an HGWC watch, and I do have an account at http://www.instructables.com.
Now, on second thought, it occurs to me that such a battery replacement instruction is probably more at home at https://www.ifixit.com. Maybe it's time for me to get an account there.
My watch was recently fed a new battery, so it will take a while before I can start.
Best Regards
your man in Hamburg