I'm looking for an ERF car seat for my childminder to use. She looks after DS part of each day and takes her own children to school before and after he's with her - so it would need to fit into her (small) car quickly. Does such a car seat exist? We have a Britax 2 way elite in our own car but it's very fiddly with the tethers etc. Does anyone know if the isofix versions are quicker/easier to install? Many thanks.