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<p>[QUOTE=&quot;Clawcoins, post: 3643435, member: 77814&quot;]I was really curious when you first posted this before Fred.</p><p><br /></p><p>I was toying with making errors a few years ago just to understand the ones that looked duplicatible.&nbsp; A heavy spring loaded device can create a ragged clip.&nbsp; You&#039;d have to experiment on load, speed, shape, etc&nbsp; But by having on flat side that was sanded it allows someone to fudge it after clipping it.</p><p><br /></p><p>It&#039;s like when I was searching for what makes a safe &quot;good&quot;.&nbsp; I researched how to break into safes.</p><p><br /></p><p>ie, to give you a head start.&nbsp; Use a hardened steel flat square anvil, use a annular drill ( a good one, not the cheap ones) to cut out a hole the exact size of the &quot;coin&quot; but on the edge to create the strike zone.&nbsp; sandwich it which will prevent deformation of even the round edge.&nbsp; Then the striking force, etc is what you have to work on.[/QUOTE]</p><p><br /></p>

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