I just purchased a used prop on ebay that looks like it's in great condition. But I won't be able to try it for a few months. I looked it over really well. One thing I noticed was on the back side around where the shaft inserts some really small curly, thin rubber strips. I'm probably just being overly skeptical, but if it was spun could you tell? Would it smell burnt? Is there a way to check without running it? The seller has all positive feedback, so I'm hoping to here from him first hand it's okay. Any thought? Thanks