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Guess I am still puzzled. Assuming I have Kadee knuckle couplers, and I am using a magnetic uncoupler-what is to stop the car from being uncoupled again after going back to the spur or siding to pick it up? Wouldnt the car come uncoupled again when it passes over the magnet? <br /> <br />And how would these work in hump and switching yards? Thanks again. <br /> <br />-Wolv33
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