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<p>[QUOTE=&quot;BenSi, post: 6438082, member: 95174&quot;]In the 12th century you are correct on the two strikes without question but I see evidence that the practices began to change in the 13th century and the copper trachea began to get smaller and much cruder in design.&nbsp; One strike became the lazy norm. Just an opinion.[/QUOTE]</p><p><br /></p>

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