I am in the market for a convertible seat for my 8 month old, and I'd like it to go in the middle seat in the middle row of my 2006 Subaru Tribeca. Next to it is a Harmony Defender and a Cosco NBB. Baby is currently in a Graco Snugride 30 Classic Connect. All three seats currently sit nice and centered in their respective spaces. I was looking at the Radian RXT since it's so narrow, but I've also been looking at the Graco MySize 70 in an effort to save some $$. I have 54.6" of hip room to work with here. If I install the Graco in the middle, is it OK for the Defender to be pushed over closer to the door, even if the latches are now offset from the base of the restraint? I hope that makes sense. TIA.