I bought the Cybex Aton today to fit between my dd Radian and my other dd nautilus. The base does fit, but the car seat does not because of the nautilus arm rests and cup holder 
So, I was thinking of buying a Radian to fit where the nautilus was - figuring DD could ride in that until she outgrows it and then transition to a HBB - but I just had her go sit in her sisters Radian SL80 and she is at the highest harness height There is no way that she'll still fit in it by the end of the year. So, now what do I do? Is there a good, HBB that is as skinny as the Radian so she could buckle herself in? I know she is mature enough for a booster - she is very safety conscious and would probably choose to stay in the harness indefinitely. She is 5.5 and 45 inches and 45lbs. What would you do? I really don't want to move her from the back row because my two other RF kiddos are a PAIN to get in that back row
So, I was thinking of buying a Radian to fit where the nautilus was - figuring DD could ride in that until she outgrows it and then transition to a HBB - but I just had her go sit in her sisters Radian SL80 and she is at the highest harness height There is no way that she'll still fit in it by the end of the year. So, now what do I do? Is there a good, HBB that is as skinny as the Radian so she could buckle herself in? I know she is mature enough for a booster - she is very safety conscious and would probably choose to stay in the harness indefinitely. She is 5.5 and 45 inches and 45lbs. What would you do? I really don't want to move her from the back row because my two other RF kiddos are a PAIN to get in that back row 
