Pull-string-to-Open Packaging Stitch Tutorial

I have been wondering how they did a Pull-String to open Packaging stitch for awhile. You know the rice bags and Potato bags that you can pull the string an it opens the top.
…yet there are no tutorials I could find on how to do this. So here is my rough diy:

You will need:
a package you would like to close on one side
a sting 4.5x the length of the side you plan to do the stitch
a 3/2.10 mm crochet hook
needle whose eye your string fits through
tape
piece of paper 3"x 1"
and Awl or something you can use as an awl
Scissors

Select the edge of the package you plan to stitch

Using the Awl, Make holes across the top of the side you have chosen.
Evenly space them and don't make them too far apart

Make a slip knot at one end of your string

put the embroidery hook through the first hole

Catch the slip knot's loop and pull it through the hole

insert the hook through the next hole and catch the string. Pull the loop through the hole. 

Make a slip stitch by pulling the loop of the string through the other loop

Repeat the process above by putting the hook through the hole into a slip stitch

Slip stich all the holes until you are at the end

Pull the string from around the package side and slip stitch

Chain stitch 3 and keep your hook in the last loop so your stitching won't come out

Take your 3" x 1" piece of paper and fold it in half

Poke a hole with the awl in the center of the fold

Put the end of the string through the hole and tape down. Fold the paper back over it.

Cut slits half way down the sides through both papers like so.
This will be used to hold your loop.

use the hook to pull out the loop so it is a bit bigger.

put the piece of paper in the loop and in between the cut marks like so.  pull gently so it tighten down

There ya go

 TO RELEASE THE STITCH

Pull up on the loop gently

Release it from the notches

Pull the string to open the package