I think that's a super idea! And not only can you practice sid, you can use it for all future practice. Use a highly contrasting thread to help with your lessons. Black even. Use an inexpensive backing - muslin would be good because it will be easy to see your quilting efforts. I am wishing I had a big quilt like this designated for practice. You did a great job, btw, putting together a quilt with goofily cut fabric. Been there, done that, and I feel your pain. :-)_