Can't find the link for the tutorial but I can try to expalin it below:
remove CG pin, remove lever, squeeze hot glue in lever hole and scrape off excess.
place lever back in CG. remove glue from gun but leave plugged in. heat up pin with gun tip and push pin back through CG pin hole. the gun will slowly heat up the pin which will melt through the glue until it is in again. then make sure it is flush and let it cool.
should do the trick.
I hope that isnt too confusing but its way easier than it sounds. I do it all the time to the watches I make for friends.