I made one out of a piece of copper tubing, cut it to fit the height of the spinner back plate then slit it up n down so it expands to when placed over the engine prop shaft. I had the same issue with the os 160 and the Dave Platt spinner. Would have preferred the spinner backplate had a small center hole so you could drill it to fit instead of the large hole it comes with. Over 20 flights no issues to date.