Thread: What is this technique?
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Old 10-21-2013, 06:28 PM
  #16  
OzarksGma
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Join Date: Jun 2010
Location: Missouri
Posts: 155
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I found this on you tube, which references the X-block ruler.
Here's the link
http://www.youtube.com/watch?v=Uqp0LMPFQ1o
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