unless they are sharp enough to cut flesh, don't worry about them...they ahould be rare.
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I see an business opportunity here: A machine that cuts it to a "mysterious" angle and enhances the sound as it would redirect any vibrations that would potentially feed back to the cartridge. And maybe the machine could offer two distinct angles for 33 vs 45. Hmmmm any buyers place your orders now and I will have a machine in few months I am sure:)