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Old July 17, 2008, 12:48 PM   #7
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Join Date: January 9, 2005
Location: Moses Lake WA
Posts: 1,001
If you drillout the nipple, be careful not to drill all the way through. I've found that just giving the bottom opening a bit of a flare helps more than enlarging the entire hole. Think "countersink." Something about nozzeling effect I learned from designing rockets over 50 years ago.

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