DS is 11 months old an bursting out of his maxi cosi-still legal but not happy! We don't have a car so we need a seat for very occasional journeys, taxis, family etc. I don't really want to spend a fortune as it will be used so infrequently and was hoping someone could point me in the direction of something small ish (I'm thinking for times when we get a cab somewhere and have to stash the car seat with us to get cab back IYSWIM).Totally clueless about car seats (and cars!) and only got the maxi cosi because it fit onto our buggy.