We looked at doing that but the inserts on the 6 push in from the outside and the 7 push in from the inside so the recesses are on different sides, even the holes are different sizes so you can't just turn the front 2 holder around, I always liked the 6 system but the 7 is so much better in ease of diff removal and don't flog out (get slop) like the 6 inserts do.