Thanks for your replies guys and thanks John for going to the trouble. I've used [link=http://www.flyfishusa.com/leaders/cortland-toothy-critter.htm]Cortland Toothy Critter[/link] in the past, but found that it'll stretch after doing some knife edges. Think I was using the 20 pound stregth on a 1.20 size cap. I have the 40# strength on a 50cc Sukhoi, but haven't put the plane through the paces yet.