I FOUND A SOLUTION. Yahoo. Check out this thing: http://us.diono.com/en/car-seat-accessories/angle-adjuster
I took out a book of slightly less thickness (thinking about compression) and tested the radian again in our Sport Wagen. DH drove last so I was able to know exactly where he sits. It still made it so the RF seat wouldn't go behind DH unless I adjusted it. But it fit beautifully rearfacing center and it would fit much more comfortably behind me.
I turned the radian FF and it fits next to our snugride in the center, which is why I wanted the narrow seat.
<previous post here>
To update, I agree. The 'old version' radian just didn't fit that well. It wasn't narrow enough to go between the seats like our complete air did, and I was uncomfortable even in the passengers seat at 5'4". I'd say we probably need 2 inches to make it fit. I could go exchange it for the new version (but Radian R100) for about an hour's drive. Does the new base get you a much more upright RF install?
I'm struggling with what to do. DS is 2 and I am likely going to switch him to forward facing after this winter. For the time being, he is in a friend's marathon and I do like that a lot. But I love, love the way the raidan fits forward facing, especially after trying other seats FF in our car, I really think this has an excellent fit.
I've thought ahead about a 2nd kiddo, and when that one outgrows a bucket, DS would be almost 4. That's not really old enough for him to 'give up' this carseat to his sibling to forward face in. So I suppose that means we'd be looking at convertibles all over again. But maybe by then someone will have a newer model out there that sits more upright, rearfacing...
Edited by Carson - 12/27/11 at 6:30am