Steamy Summer Sunrise done in a week!

I am mighty pleased with myself. I finished my art piece today and have called it 'Steamy Summer Sunrise'. It measures approx 30" by 38". I did the edging using varigated rayon thread and a 3-step zig-zag stitch with the stitch length at 0.2 and the stitch width at 7 (Elna 6005) and then I trimmed close to the stitching with scissors. It is not hanging totally straight so I am going so wet it and block it in the hope that it will behave a bit better. The photo shows it smoothed against my design wall where it behaves nicely, but hanging in free air it is not so good. I need to make a label and hanging sleeve but it is as good as done!

I showed it at quilt club today and several people were very interested in how I had done the edge. One thought I had gone around 3 times and another thought I had used a triple needle!
Close-up of the quilting:

Left edge:

Bottom edge:

Right edge