We just bought Radian R120's from Amazon when they were on sale and I have a couple of questions. There is a infant/toddler support cushion that isn't attached anywhere, did you use that with your older child? DD is 3 and so far the padding is just annoying because she messes up how it lays when she climbs in the seat herself.

Second and more importantly, are you able to pull the seat up when FF if you pull up on the bottom of the seat? We used to have a Britax Marathon and that thing was rock solid in all directions. The Radian is great side to side, but if I accidentally pull up on the tightening strap the whole base flips up, which seems really not safe! It's tethered in the trunk.