DS is still in his Britax Blvd in my car. He had a Diono Radian in DH's car, but it was SUCH a PITA to tighten correctly that at age 7 we finally ditched it. my husband threw a booster in there until we got a "real" seat to replace the Diono, but I have no idea what to get. In the meantime, even sitting on the booster, the seatbelt is coming across his neck. I know that can't be right. It seems all boosters are about the same height...what should I do? (he is 50+ inches tall, so totally normal height, in the backseat of a Camry) TIA for any advice - I feel like I should know this