I saw a free pattern here, and thought it might work well for next year's RSC project. The pattern was for a 16.5 inch block though, which is not exactly a scrap friendly size.
here. I cut the inner squares to 2 7/8 inches, and then used the easy angle for the outer squares. Somehow, instead of a 4.5 inch unfinished, it was 4 inches unfinished. I also should have squared it up, and the corners seem to be bigger than the edges.