I was pretty much a mediocre "piecer"; always fudging; always giving up some of my points for "squareness". But, I followed this class closely. The first thing I realized is that we were not too far off from the process Kate teaches. A few tweaks, a couple of changes and I have become extremely confident in my ability to trust the outcome through the process. And, to answer your fabric question: I did not buy any new fabric for this class. All the fabric comes from my personal stash. I happen to favor t raditional quilting and civil war repo fabrics. And, I love to use muslin. I will even coffee stain my muslin as I did for the border and some blocks. For me, muslin looks great in a quilt like this, and the coffee stain adds a bit of texture to the muslin. Thank you again for your comments.