from left to right: Graco Snugride transitioning to Uptown (RF) then FF Radian, Nautilus.
They must go in this order, as the middle belt path is EXTREMELY narrow, and the Radian is the only seat that fits in it. The seat to the left seems more narrow than the one of the right, hence I put the RF seat there. I tried an old Cosco high back booster (yuck-o!) to the right of the Radian and it did fit, but that seat is being replaced.
I am trying to determine if I need another Radian or could be away with the Nautilus (which is my first pick for a seat for my 4yo)
I see what you are saying Gypsy about the armrest depth. I was thinking the armrest would go OVER the radian lower seat. I wonder if Walmart will let me take the demo out to try it in the car?