the crackleback is a great fly. the variations are limitless. i fish them dry, wet and stripped like a streamer. as small as 16 if i am fishing dry and as big as an 8 if i am fishing wet and i want to strip it. alot of times i plan only fishing wet, so i tie several of them with lead tape on the shank to weight them a bit or i fish them on a sink tip line. i have fished the original version, but the most productive for me is a green flashabou body with furnace hackle. badger, grizzly and dun hackle are great alternatives as well. blue flashabou, red flashabou and orange holographic tinsel bodies are some others that have worked for me, but the green has been far and away the best in the waters i fish. have also thought of, but not tried yet, using wire for the body to eliminate the lead tape for fishing them wet. let us know what you come up with and post a pic or two of anything you think is particularly innovative.