We have a long drive coming up, tall dd1 aged 2y9m is in a 5 point belt carseat than doesn't recline any more (dd2 has the other one and it's too small for dd1 anyway). She ends up hanging like a rag doll forward, laboured breathing, even though straps are tight on shoulders. I have a baby travel neck cushion, that just falls straight off. It drives me nuts. advice, products I could buy, anyone?