I also use Gene's leaders ,and have for some time. The first key is he uses a harden alloy sleeve and with every crimp a special retaining compond is applied prior to crimping it bonds the sleeve to the leader. Each crimp is crimped to a tolarance of .002" they use a special set of crimping dies. The stainless steel/ fluorocarbon leader materials are of very high quality, and all leaders are pull tested to assure the proper strength is meet. Uncle Frank has access to all his products.