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Adding flop tube to S1S wing tank

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planebuilder

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I want to use my wing tank for smoke oil. It has the "fuel" pick up as a threaded boss in the bottom center of the tank. There is no flop tube, just an AN fitting screwed into the boss for a 3/8 tube. I was thinking of adding a small vinyl flop tube to a fitting and screwing it into the tank bottom. Has anyone done similar?
 

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