Brent I used to cut keels from sheet lead and cast anchors in an old adjustable wrench handle so it makes a hole for the line. Rather than knots I crimped lines on birds and anchors with a split piece of copper tubing. Never had one let go. Remember to cut your lines so the last figure 8 wrap lets you bend the anchor around the head, leaving no loose line. That way you can bag your decoys and don't need individual pouches. Fifteen life-size or slightly larger decoys will fit into an old GI seabag. Situation and boat type determine whether to empty bags to bottom of boat and leave ashore or bring full bags and use for camo or dog comfort when out in the blind.