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Old 08-19-2013, 10:53 AM
  #10  
woody
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Join Date: Aug 2009
Location: Canberra, Australia
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I have only book 2 and think it's great, there is plenty of information for the bascis OBW + the cubes. A friend has book 3 and it goes into the more extreme hollow cubes, like ones that interlock.
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