To put my 55lb almost 7yr old back in a harness for our road trip? I could squeeze her into our Apex65, and squeeze my 38lb (almost 42 in) almost 5yr old into a scenera. I don't know if my oldest would be happy about it though. It would be a tight squeeze, and she's been in the Turbo for a little over a year now... Thoughts? She doesn't sleep in the car anymore, so I'm not concerned about that, and she's pretty good about staying put in the booster.