While not a true rotary, I made mine. A simple piece of thin spring steel looped around and held with a single rivet near the jaws. I can put my finger in the loop, and it spins around my finger as I palemer the hackle. But I am a cheapskate though.

Have fun, Jeff

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Tis my time on the water, in the mountains, and in my driftboat where I can see things as they really are.