my biggest channel last year was caught while fishing the Crappie Candy fly fishing for crappies. Over five lbs. I've caught cats on small nymphs, marooskas and wooly buggers, but nothing beats a black Gill Buster jigged slowly along the bottom. Those little things catch fish! All of this said, I can't remember ever targeting channel cats on a fly. They've all been tremendous surprises. JGW