any advice please would be welcome on suitable seating for 8 year old with cerebral palsy. my car seat is not FAA approved. have been given a crellin harness on european flights but this was pretty useless. travelling to florida next month and would just like to make him more comfortable for the flight. pretty good trunk and head control but needs a 3 or even 5 point harness to secure in seat if not in an actual car seat. any experiences welcome. thanks.