Hey Scott I'm just starting to play around with them again. Mine are bought and they are made from 6/0 uni thread and mono. I love the way they cast, float, no memory, and it makes re rigging easier. I also like being able to drop 7X off the tippet ring on one section of river or change it to 5X on another without out sacrificing a leader or tying a bunch of knots. Where it shines to me is 1. casting. 2. dropping thin tippet off the ring. I can get much deeper if I use 8' of 6X tied to the tippet ring and I still only have a 12 or 13 ft leader that will cast great. The extra length and smaller dia tippet allows the fly to sink faster. I hope that all that made sense. Bottom line is just buy a good one and see if you like it.