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I PC'd my Platinum into a QS1 after 10 months. I didn't even realize I could until I had read about it on here.
I would get on the live chat and ask if you can "upgrade" your Platinum to a QS1. This should net you a QS1 with a $19 annual fee.
The regular QS (no annual fee version) has higher credit score requirements, so you need to work on establishing your relationship with Capital One if you want to eventually PC both cards to it.