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Congrats!
2-3 statements after this CLI; start hitting them up again. Seems to be the common wait period inbetween CLIs when I initially thought it was 6 months. Just hit the luv button once a month after the statement cuts. You have nothing to lose with a SP. It's pretty much my plan once my 2nd or 3rd statement cuts on the new Platinum/Quicksilver One I just got.
Congratulations and good luck! Even though they may say they'll give you at least $250 for your credit stepts; they've been known to go beyond that when your card hits that 5/6 month mark. I can't wait!