I drive a Volvo XC90 and am wondering if I could fit a Radian XTSL (which we already own and use in my husband's car) in the center of the 2nd row, next to an outboard RFing Advocate? Planning on buying the Advocate for my younger daughter and trying to figure out the safest placement for both kids in the car. In my car, my older daughter currently rides in a Frontier 85 outboard, without SICT, so I was hoping to find a way to just move her to the center for some extra protection. I feel like my younger one already has so much more safety with a RFing seat and then especially if her new seat is an Advocate. Her current Marathon is expiring, so we have to buy a new seat for her... don't have to for my older daughter, but still want her safe too, so trying to reconfigure things. (Her Frontier can easily be moved to my husband's car. If we can get a good install, we'll put it in the center of his back seat since the car doesn't have rear air bags. We currently don't keep a permanent seat for my younger daughter in his car since she doesn't ride with him much, so we don't have to worry about fitting next to something in there.) Thoughts?