I really like gaff hook/stiff hook rig for trolling lure but takes too much time to rig it with heat shrink tube. what I did is to substitute heat shrink tube with fuel hose. Materials: 1 trolling Lure. 1 Mustad 7691 hook. 15ft of 400lb leader. 2 pcs aluminum sleeve. 5/15 inch Fuel hose. Plastic tube Tools; Crimping tool. Lighter.