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I tried to PC the QS1 to a regular QS as well. No luck at all. Instead, I combined the QS1 into an existing Cap1MC to get a higher combined limit without having the AF.
I've had my 2 QS1 for over a year now, excellent history with them, but they will not upgrade mine for nothing, also I hit the year mark, hit the CLI on both, offered a $200 CLI on one and denied on the other! LOL BTW, my signature scores aren't updated, they are much better now. Who knows with them, they have no rhyme or reason.