Hello, I have a 6 year old who is about to outgrow her Clek Fllo at 48.5" and 47lbs. She does fall asleep in the car on somewhat frequent long drives, so I'd like to keep her harnessed for a couple more years, if that is attainable. I'm seeing in the review that the Britax Grow with You has the tallest harness height, but in the review it seems like a 49" kid is just barely fitting, and it is only rated to a 49" kid. Whereas the Chicco MyFit is rated to 54" height and the review also suggests a larger kid (50" tall) had a couple inches to grow in the harness. But the Chicco harness height is not as tall as the Britax, and that's where I'm confused. Would also prefer not to buy Made in China, but not seeing any other options for extended harnessing...last thing, we may be using the car seat in Australia and Chicco doesn't sell there, so would also prefer Britax for that reason as well. But yeah, sounds like Britax probably isn't big enough? Thanks for any help!