What I did was set it up among my usual spread. And if it made a difference, I couldn't tell. The high-flying mallards that perennially pass my spread without a second look passed as always. And the ducks that did decoy into gun range didn't seem to come any more readily or in greater numbers. Sure, a few came into my setup as if on a string, but that's true on most hunts, with or without the spinning wings.