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I have a bag of whistles in my jacket pocket. Most are CMG. I grind my teeth a lot so I find the CMG is more comfortable for me to use.
I might buy 2 new whistles a year to help save my teeth.
Also, the inventor of the whistle is a member of our board and has a lot of insight into the game so I don't really mind shelling out a whopping 12 dollars.
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