This is an amazing piece!! I did my first (and only) T shirt quilt a couple years ago. It was a collaborative project the with the recipient, who was planning to go on to major in art in college. She and I worked out the colors and sizes and layout on graph paper using colored pencils to visualize the colors. We rearranged the pieces many times before satisfaction set in. It was a fun project, but I'm not sure I'd repeat it!! Wouldn't have a clue on how to do it with "math"!! Bless your heart!