The leading edge of the keel ****now acts like the lip on a crankbait. When current hits this "lip," it pushes the decoy to one side. When the deke reaches the end of the cord, the block hesitates, then swims back to the other side. Seen from above, the wake is constantly changing, just as if created by the real thing. Because water force is greater on the modified decoys than on in-line keels, use 8-ounce anchors when setting the spread. Four swimmers per dozen is a good ratio--any more and you're asking for tangle trouble.