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<p>[QUOTE=&quot;Nerwign, post: 193656, member: 3570&quot;]Thank you for prompting me to look closer.&nbsp; I&#039;ve been inspecting that one a lot but have made a new discovery.&nbsp; The one on the left (which looks lumpier on the back) flexes in most directions *however* it also has metal in it.&nbsp; It has two small metal rods positioned into a &quot;V&quot; shape. Each bar of the V is rigid however the two pieces of metal are not connected together, so it can be lightly flexed along the direction of the V&#039;s point.&nbsp; In the second photo, the V points to the left.&nbsp; Like a &lt; sign.[/QUOTE]</p><p><br /></p>

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