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I gotta get some of these. I have been using mono droppers, I guess because I'm cheap or something.
Crappie and gills usually shy away from the vertical presentations of the halis. They are great for perch, who are more apt to striking a spoon than the counterparts. The chain is not bulky on them, and greatly helps the action. It folds up on the jig when aggressively jigging, and will keep the spikes or waxies almost in a still position while subtle jigging them. I don't see mono reacting the same way under those conditions.