yeah I think so .......unless you are willing to upgrade to a longer bodied seat it will be time to turn him...You need around a inch clearance in rer facing to allow for the fact everything will compress backwards in the crash situation......just reading your ticker and he is 19months so you have done well.

If anyone is interested there is a petition going to bring bigger 'toddler' rearfacing seats to Australia......I will post the link here in case anyone feels like writing a heartfelt letter to the various authorities about this...

Campaign to manufacture and sell Type D Rear-Facing Toddler seats in Australia