actually it is stock and i don't really know how to do the glue mod. 8-P
buy a glue gun from a arts craft store or dollar store.
remove CG pin
heat up CG with gluegun
press glue into CG hole
wait a few minutes for glue to dry a bit
place CG pin back into hole and heat it up with gluegun
start pressing in while glue is hot.
press pin in till desire look.
wait to dry and remove excess glue.
10 minute mod = priceless.