I don't know if the above link is the same person as the book "How to Make a Too Cool T-Shirt Quilt" by Andrea T Funk. My daughter made this quilt for me using the book. There were no set-in or Y seams. She did not use a stabilizer or anything under the shirts. The most time-consuming part was charting it all out--she said once it was charted on graph paper, it went together quickly. She also sewed on patches from various activities I'd been involved in. She quilted an all-over meander on it.
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This is my favoritest quilt ever. It depicts my life over the last 40 years.