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Rafi showing us the woodblock tube holders
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Showing us the Anvil fixture
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Securing some practice tubing for hand mitering using a file
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Using a protractor to check for 90 degrees
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After hand mitering, there should be very little or no light passing between the tubes
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Welding in a shipping container
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Ocy-acetylene
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Watering down the flux
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Applying flux to the inside of the tube
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Preheating the tube
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Brazing, letting gravity pull the brass down
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Fillet brazed tubes