Originally posted by FastEddy
You can order a hole cutter from your LHS or use a hole cutter on your drill.
I have found it easy enough to draw a circle using a shot glass then carefully sanding it with a roto-tool drum sander. If you go slow its not to hard. You know you own limits as to how steady you are. I would give it a try unless you have Turret's Syndrome or are prone to blacking out.