This is one of the most intriguing and interesting modern quilts I have ever seen. It is simply spectacular. I see why quilting it will be a challenge to complete its wonderful look. I would suggest getting a piece of plastic like you would use to cover a table and superimpose it over your quilt and draw designs on it to try them out. Please don't forget to show us what you do for quilting. I think another challenge might be deciding on thread(s) to use.