How wide a siz zag? What kind of needle? Does the zig zag go right through the corg, or are you zigging to either side of the cord. What happens when the needle hits the cord, does it go right through it or break? Or is it supposed to zig zag on either side of the cord and miss the cord? Sorry, lots of questions, i have never seen this done, and wonder if you could tell more??? Thanks so much :) :) :)