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Old 06-10-2014 | 05:46 PM
  #35  
1QwkSport2.5r's Avatar
1QwkSport2.5r
 
Joined: Oct 2006
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From: Cottage Grove, MN
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The Merlin plugs are color coded, but if you use more than one kind of plug in a single heat range then it might be tough.