I was in a sewing machine shop the other day. I saw this terrific machine that does a straight quilting stitch that looks so much like a stitch done by hand. I think it will do wide curves, however I think all you can adjust is the length of the stitch and the distance between stitches. I can't recall the machine brand, it started with an 'S'.
I surfed and could not come up with that machine or any other brand that does the Sashiko stitch. Help please. Libber