What a beautiful denim quilt. It is the best one I have ever seen. I can tell it was a lot of work.
BTW, I recently did a denim quilt. May I suggest that you get a large supply denim or leather machine needles? The weight of the quilt when sewing sometimes will pull your needle and bam you have a broken needle.
Good luck with the quilting. Oh, and be sure to get a supply of Bengay or other muscle soreness reducer because your upper shoulders and arms are going to get very sore. My husband would use the massager on my neck, shoulders and arms after a session at the sewing machine and boy did I need it!