Oh, Riley. What majesty. Like everyone, I am also in total awe of both you and your quilt. I have only today come across your post and the picture. It's truly spectacular.
Also like others, I too have a couple of questions (hope you don't mind after all this time):
what sort of support did you use for the hand piecing - i.e. vyline, tissue paper, regular copy paper;
how much background fabric did you use for the quilt? I have the DJ software which gives that info, but the variations between methodologies seem wildly different. I figure you would be able to tell from first-hard experience
Again, congratulations. Thanks.