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You dont need any weights. The design is called a "willow spoon" and has been around for years and years. Less weight the better. You jig them up a foot or so and then let them fall on slack line, they will flutter as they fall which really brings in the fish. Then when you get a mark, lift it up and jig it like you would a normal spoon and they will smack them. I've been using them for years. I use them in open water also, a couple weeks ago I nailed the crappie on them.
Great Lures! What is the possibility of make the blades concave and pouring lead in the cavity? We used jig fish on the river where I fish and need weight due to current. The walleyes kill them! Nice work!