The end is near

I just moved Logan's harness straps to the top hole. It still gives him plenty of room to grow and his seat is good until next August so I have another year plus some but it's sad that he old enough and tall enough that I'll have no choice but to move him to a booster seat. He already sits in one in Daddy's car and he sits there well but I know it's just not as safe. Think I can have the truck/car retrofitted with 5pt harnesses for everyone? LOL