I've been using the Be Safe infant carrier for my 5mo son but he's enormous and I'm struggling to carry him from the house out to the car in it. No driveway so can't always be parked outside our door. The height/weight limit is 75cm/13kg. He's currently around 70cm/9kg and if he follows his centile line he'll have outgrown the seat in height by the time he's 8 months. My daughter who just turned 2 is in a Maxi Cosi swivel Mica seat which is great and I sometimes use it for my son if it's just him in the car. I know I just complained about carrying him in the current one, but being able to set him down in it is actually a plus point as DD needs helped down our front steps which go straight onto the pavement and managing that plus carrying the baby and a bag is a challenge without letting go of her hand and I don't quite trust her not to run away.
So my question: is there a swivel seat that will do him up til 4ish that you can also lift out as a carrier for the short term? DD is a titch and he's likely to overtake her in weight pretty soon so expecting her Mica will last her beyond 4 so it's not a case of finding something to do until she moves up to the next one if that makes sense!