Tuesy here is my take on the 9 patch.
I cut two strips 1 1/2" wide by however long you want.
I marked a 1/4" seam allowance on one to be sure I sewed an accurate seam. I am not a novice but I am not always real accurate. When you are doing minis where you have to have a specific size this is a smart thing to do to make sure you are accurate.
I trimmed the center strip to a 1" from the seam.
BTW I use copy paper to work out the bugs before I sew when I have something I haven't done before. You can cut and sew it just like fabric.
Have patience as I load these.