Ever since I lost one of Joni's Furled leaders and tried to recover it with scuba gear, I have been giving consideration to using a small spinner blade or something to create vibration in the water. I love the spot this happened because I catch huge Walleye there. However, once I went down in scuba gear I realized that the fish in that water in the best of conditions have about 16 or 18 inches of visibility. Those little spinners you have right there I could just clip on the flies I already have.
Where did you find them?
It should be interesting trying to get one of those out of the water with a spey cast huh?