The lower border used insert C for corners and insert A through the middle.
The centre border used no insert and the fall away piece is the upper border.
And now I am excited to share how I used the same punch with insert C to make this amazing flower which I have named
4 Corner Punched Flower
Below is the video tutorial on how to make these flowers.
Here is one of the close ups.
Here is the 2nd close up.