Good Morning, I only tie classic Catskills flies. I use Art Flicks book,Harry Darbee book and, Sheiberts book from when he was 19 years old. Some times I may change the body color but basically they are all catskill type flies. I tie a lot of caddis flies and have caught a ton of trout on them. The most popular one that I use is an olive/gray body in a size 16 with a dark fun hackle and deer hair wing. Bill the mailman