I am trying piping a round bag and am new to this. I wanted the advice of all those who are aware of this. Do you’ll use any cord when doing a piping? If you do, do you’ll use a plastic cord, foam cord or a 3-4 mil rope, or don’t use anything at all and just fold the leather . I normally do small bags which won’t be larger than 20 cm. What is your advice on applying and stitching the piping neatly as you cannot really see the piping side until it is done and stitching thru layers is hard.