I had to read the user manual (which I know sounds dumb, but is one of my favorite things to do -- read user manuals to learn something new).
I took these frames.
Removed the current mat, flipped it over and re-drew the new mat lines.
Used this cutting system.
Lined it all up.
and Voila!!! I did it. (8 times)
The first couple were good learning experiences, but probably no one but me will ever notice. I already hung them on the wall. I love them!!!