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<p>[QUOTE=&quot;doug444, post: 2659749, member: 38849&quot;]Well, you may be right; I measured along the same diameter.&nbsp; How does a TPG measure the amount of off-center?</p><p><br /></p><p>But on a piece 20% off-center, the unstruck portion should be 1/5 of the diameter, and the regular struck part 4/5, would you agree?[/QUOTE]</p><p><br /></p>

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