Very cute! I did my zig zag as the last step after construction. I adjusted my setting to a fairly large zig zag, put on my open toe foot so I could see where to sew the edge and knotted and buried my thread ends when finished. I did increase the stitch length as I came to the thicker outside corner but I had no trouble sewing slowly off the edge. I can do a pair in half an hour now, guess what everyone is getting for Christmas.