<div><div><br></div></div><div><br></div><div>Looks like mach 3 has something built in. </div><div><br></div><div><a href="http://mambohead.com/2011/04/how-to-change-cnc-endmill-without-loosing-z-zero/">http://mambohead.com/2011/04/how-to-change-cnc-endmill-without-loosing-z-zero/</a></div>

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