I'm a simple quilter. I use a dual feed foot or a walking foot and I straight line quilt my quilts. On the last string quilt, I quilted the square grid, sid each block, then I quilted on the diagonal along one side of the middle white strips.
I ordered a solid Kona cotton for the binding and back in Honey Dew (light green), I thought that would make a nice frame around the sides. I also have a row of string blocks made to put in the center of the back to dress it up.