Hi, yesterday I got my model X 90D. What a wonderful experience! It is a 7 seater. Now I need to find the best car seats for my 3 kids to fit them into the second row. The kids are 5, 6 and 8, so I was thinking 1 booster seat for the 8 year old and 2 forward facing seats for the younger ones. Anybody with a similar setup and ideas on what seats work best and also if belt extenders are necessary. THANK YOU!