I wish I could tie flies. I applaud all that can do it, tying those super small intricate designs takes some skill and steady hands and good eyes. I tied a 1/64oz jig on a size 10 hook once, and it was a simple marabou jig and that was a challenge, I could not imagine tying a Cahill or Royal Wulff on a size 18 hook, super talented is all I can say.