Hi all! I need some advice- my son is just shy of 18 months old and he's pretty tall for his age. He has a convertible car seat which is rear-facing, but his legs are bent and resting on the seat in front of him. Is that safe or is it time to forward-face? I'd like to keep him rear-facing as long as possible as he only weighs 19 pounds, but DH thinks it's less safe for his legs to be positioned that way. Thoughts?