Whether it's a streamer, wet fly or soft hackle, that's a cool fly. For hair/fur hackle flies (like a Casual Dress) I like to insert the fur into split thread (I have one of those Petijean clips to hold the fur but just about any plastic bag clip would do), spin and wrap it; I find it a lot easier than the waxed thread/loop method, but both get the job done. Thanks for the fly and the link to the book.