Topic: String Dampers
These are pretty cool gadgets for you shredders out there but I'd be very leery about drilling holes into the headstock of a guitar. I don't mean to take customers away from Jennifer but a good ole' thick pony-tail holder( fluffy elastic device) works just as good and no harm comes to your guitar.....
http://www.youtube.com/watch?v=kTwr-OLmju4&NR=1