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Old 12-12-2018, 10:11 AM
SlimGeezer SlimGeezer is offline
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Join Date: Dec 2018
Posts: 17
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A 650 has a 52mm nut. 640 has a 50.

You're right. I have long thin fingers. And, according to my grandchildren, I am an old geezer, so I need every advantage I can get.
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