I have already cut all the pieces. I cut 5" solids, and 5" blocks for the pinwheels. I have assembled the pinwheels and now they are larger and the edges are not all "even". So I started to even up the edges when I got to thinking about my original question posted here. I did realize that I would need to make sure my angled lines were all 2.5" and to make sure the point remained centered. I would find the center point of my solid square, match it up to the center point of my pinwheel and then cut it to the right size? Is that correct? I have only trimmed a few and realized that they still weren't all the same size. Some needed more trimming than others. I stopped when I began to question myself. I have no room for error here.