Speaking of the Copper John, developed by our friend John Barr, I have a cool story to share: Barr says he basically invented the fly by accident. J.B. is big on the hopper-dropper approach, and his real "killer" fly is the Barr Emerger, an often tiny, but deadly, pattern meant to imitate PMD and BWO emergers. But that's a light fly, and J.B. figured he needed an "intermediate," fast-sinking nymph to get the emerger down in the strike zone. So he developed the heavy, wire-bodied Copper John, basically to serve as an anchor. The hopper-copper-dropper approach was born. And, as for the Copper John, it was, at it genesis, an afterthought, spun from necessity. But that sucker proved to catch fish in its own right, and is now a hands-down producer all over the world.