I have been looking at my rear seat and trying to figure out a way to SAFELY & SECURELY attach my daughter's rear facing car seat base into the middle seat section. There are the provided anchors on the left and right sections but none in the middle and using the seat-belt does not keep the base 'locked' into place. It's not a huge issue but I am planning ahead for any upcoming road trips so that I can maximize the room in the rear for the older two kiddos. I have though about mounting some d-rings under the seat bracket bolts but haven't looked into it further. Has anyone mounted the base in the middle with any success?