I really liked the original design by dutchy, but it just wasn't catching enough wind for me. So, I doubled the width of the blades without changing the length or the thickness (or the connector!). Making the blades catch more wind necessitated making the tail longer. While I was at it, I wanted it to take a beefier pole, so I changed that so that you can fit in on a 1" (max) diameter pole. I also flattened out the inside of both the mount and the hub so that I could fit a washer on each for added strength. Oh, I also added a cap on the hub, just to give it a "finished" look. You can see a comparison of the original and mine in two of the pictures (with mine obviously being the one with the wider blades).

Printed with PETG, since it's my favorite stuff.

Edit: I added an additional stl which you may, or may not need. I grabbed a pole that was 7/8" in diameter, so I made an adapter to be a press fit on that 7/8" pole with a .980 outside diameter to fit in the 1" hole in the mount and allow the spinner to turn easily with the wind.

Edit: Added an .980 outside diameter Adapter Topper which will mount to the top of any pole 1" diameter or less to fit in the 1" hole in the mount and allow the spinner to turn easily with the wind.