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Old 08-28-2014, 01:18 PM
  #4  
willferg
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Join Date: Aug 2010
Location: Northern California, Sonoma Co.
Posts: 2,814
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I had one, and I put it outside on top of a flat surface with flat heavy rocks on it, and it flattened back out. I know there are a lot of approaches, but this worked for me.
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