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I have system that prevents this. I keep my eye tube cap tester on hand, pull the old cap, put on tester set for value and null the eye. even really badly leaky caps will get some kind of null. leave the settings alone, grab the new cap, put it on the tester, you should be in the ball park of the null setting. On a 10x difference like you have it become obvious that the wrong value is being replaced. After confirming value switch to leak test and confirm the new cap is indeed good to go. I have had new china yellows that were shorted.
My cap tester gets a lot of use when recapping.
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