Your quilt turned out great! A shame you didn't like the process. I took a class at the LQS and with the interfacing we used actually had very little problems with it, no stretching to speak of. I'm making another one for my brother-in-law soon. Nothing fancy mind you. I'm wondering if there are different types of interfacing for t-shirt quilts. I'm thinking I better make sure I get the same one again so I don't run into problems.