Plus this way, bubs just stays in the same seat until next the baby comes along, then we'll reverse the seat again so new bubs hopefully gets lots of use out of it and we'll upgrade DD to a seat that will hopefully last her as long as she needs
Thats exactly what we did, DD1 used the turn-a-tot til DD2 came along, we borrowed SIL's other turn-a-tot then when DD1 was big enough we put her straight into a 'big girl seat'.

Also i had a pram that had a hard shelled baby carrier that could fit onto it so i ended up using that attachment where need be.