Hi there my baby is nine months and is really now in need of a different car seat (I have isofix base and a Hack car seat that you can remove. I now need to buy the next one up but I am confused, do these not use the isofix system now? Also I just bought a different car (Seat Toledo) and the under the seat storage means my isofix base (the one using now) doesnt touch the floor of the car properly. Will this be a problem now for the next seat as I wanted to use isofix?