I believe corkies represent an egg,or a cluster of eggs,but who really knows what a fish is thinking when it strikes? Corkies are most commonly drift fished for steelhead and salmon, although catching trout and other species is not unusual.The drift rig I use is as follows; 10-12 lb mono mainline,dropshot swivel,pencil lead (pinched onto a tag of mono, tied to the dropped eye of the swivel),24"-36" mono or flouro leader tied with an egg loop to a size 6 to 2 octopus style hook.The corkie is slid onto the leader before tying (the leader) to the swivel, and secured just above the hook with a toothpick.The corkie should be size matched to the hook (it should just pass through the hook's gap).As far as the right way to fish this setup,snagging or "lining" is a highly debatable subject. IMO,the longer the leader a person uses,the higher the chance of "flossing" the leader through a breathing or moving fishes mouth. The "fisherman" will feel this,and set the hook with an upward jerking movement. This can be often observed at hatchery deadlines, and most popular combat areas. However, this technique has been proven very effective, and can be used in a sporting and ethical manner. Learning to identify "fishy"water, the feel of a fish taking,the proper size and color of corky,just the right amount of weight ect, makes this form of fishing a great way to learn to "feel" the river,tie knots, choose gear ect.