I'm looking for advice on car seats for RRS 06. I need one infant car seat, peg Perego 4-35, and two convertibles, one RF and one FF. I have read that my rear hip room is approx. 52"? Most people say that car seat specs aren't always the best to go by since the width measurement is only by the widest point on the seat, which isn't always the base... What are you using in your RR Sport?! PS apparently NO ONE owns a RR Sport and has three kids on the internet!>:O I've found nada on this subject so far.