There is no waste in Bethany Reynolds' method... :-)
I haven't done hers but my friend has and I didn't like the stacking part and pinning to keep in place. But hers came out beautiful but it wasn't anything I wanted to do. But I didn't mean there was waste I just mention that there wasn't any so you would know....and that you could use scraps or your turnovers or 6" squares. :)