At 13 months I would find a way to get a good RF install. I don't consider FF an option before 2 or so.
I have that seat, what's the trouble with it RF? Maybe someone can help you get it tighter.
BTW, DD screamed in the car around that age too. It's really tough! But they really do outgrow it. Now she's happy as a clam at 2.5 (still RF, in a Complete Air).
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