I've seen similar patterns before and wondered how they fit together. I looked at your blog and saw how it happens. Thanks for the explanation. I made Karen K. Stone's 'Cinco de Mayo' pattern, which is similar to this but is square blocks. All the parts were hand drawn on tracing paper. I found it tears off easier than other paper. My quilt is 5 blocks X 6 blocks (each block about 11" square). My color palette is very different than Karen's tho.
Did you stay with the main color palette or change lots of areas? Did you make up a colored map to know what yours will look like before beginning the piecing of the sections? Is it difficult to sew the curved shapes together, some of those curves look kind of tight?