I picked out a fly from my box yesterday that looked like it would serve as a weight to get my other fly down into the fishes target and after I got a fish on it wondered about what it was. It had a peacock body, bead head, and a marabou tail - also a kf stripe down the side. It was one of my ties, but don't remember where I got the idea for it. I do remember a pattern of Gary LaFontaines where he used a marabou tail on a nymph, but it made me wonder.