I have never tied one. When you speak of color, are you talking about changing the body color and leaving the hackle the same. I found a picture of it here: http://www.angelfire.com/wa/salmonid/fly136.html
What sizes? 4's and 6's?
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It has always been my private conviction that any man who pits his intelligence against a fish and loses has it coming.

John Steinbeck