The fly in question has been around out here for some time now, really nothing new. The easest way to tie the hackle on is to fold the CDC feather. Tie it in by the tip and wind it around the post. Or you can also do it with a dubbing loop. Either way will work. It is easier to get the right length with the dubbing loop than by the folding method. But as long as the hackle isn't way to big the fish do not care. Ron