I have the grandfathered 15k CLOC and I have used it to speed up CC payoffs.
The way I did it if I can recall correctly is I placed all of my bills onto a card which had a 1,000 minimum monthly payment (50k balance?). That freed up cash flow. Then I would use my CLOC to make a 15k payment against the balance all at once and pay off the CLOC over a period of a few months. It allowed me to skip a CC payment, plus chopped down my monthly CC that way.
Just like people use refi's as a way to skip mortgage payments I was doing the same with extra large CC payments.
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