HOSS!!!!!! Picky..Picky..Picky.... BUT a comprehensive answer, it does clarify the point. The memory thing, I don't trust mine anymore and I just related what I remembered (a mistake)about the radius of the pointy end of the spinner / nut. My real point is that in the "general" rules there is no requirement for a non existant "safety prop nut", meaning other than those specific requirements cited.