We just flipped our son forward (flame me if you want), and his shoulders have are just about too tall for the harness. I have adjusted it to the highest possible location and had several people look at the seat and the directions with me to make sure I am not missing anything. We have the Britax Boulevard 70, which I thought would last us a long time, but ds is 34 inches and off the growth charts. I still didn't think that he would outgrow this seat so fast! The shoulder harness height is 16.75 inches according to the britax website, does anyone know of a convertible seat with a taller harness? If not, do I need to move him to the next stage of carseat, whatever that is? Thanks!