This would be a great device except the center hole (which makes everything work) is NOT in the center. It has a visually obvious offset that renders the device unusable. UPDATE: The manufacturer of the device felt that the device I received was not representative of their product. They sent me a new center finder and I'm happy to say the device looks perfect. I haven't found any other product on Revain that works as well. I have updated my rating to 4 stars and only downgraded the last star due to the original issue (otherwise I would have given 5 stars).
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