I really enjoy reading these debates to get others perspective. I like others have no idea what the fish see of why they feed on certain imitations, selective. I like to tye and fish Catskill style flies and fish them in the south, west and northeast on all types of water with success. About three years ago I started to tye Hans CDC and elk, though I use deer. I tye them with a wrapped CDC body in various colors the same for the wings. I use them to imitate, caddis.mayflies and ants from size 10 to 22's. To me it is one of the best and consistent patterns I have ever fished. Why they take that style I have no idea.