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If the Westinghouse required user to maintain color sync with a user control then it was a bad design(disclaimer I've never owned a Westinghouse TV and am not familiar with their circuits). Many users had confusion with even the simpler control schemes extra complexity is not a selling point.
I'm rather partial to the GE chroma ref circuit... just gate the color burst to a LC tank circuit that will once stimulated will ring on frequency and in phase for more than 1 horizontal line...it was cheaper and simpler than RCAs approach and just as stable and effective.
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