> "fire-aft distance"

Sorry, darn auto-correct on my phone.

"Fore-aft" distance is what I meant. Essentially, the distance from the back of the child's seat to the driver's seat. In nearly all vehicles we own (including mid-sized SUVs), it's a close fit to install a baby carrier. In some cases, the front seats will be pressing against the carrier (unavoidable in some cases). With a full base, it's very obvious when the carrier is being pushed up too far by the contact and we need to adjust.