Great tutorial but I have two comments/suggestions:
First, when inserting the pin into the hoodie I think it’d be even easier to pass the pin through the hoodie if the pin was inserted HEAD FIRST - meaning that the thicker, curved head should enter first. I run electrical wiring using a snake with a looped end. We often have to wrap electrical tape around the part of the looped end of the snake so that any open edges don’t catch on anything as the snake is being pulled. Similar concept applies here. Putting the pin in head first would probably facilitate it passing through more easily.
Second suggestion is to cut up a wire hanger and create a make shift snake/pull. Run it through the channel of the hoodie out the other end. Once through, loop one end of wire, put in string and tie a knot larger than the loop, tape any rough edges with electrical tape, and slowly pull through. Crochet needles or some other such knitting/crocheting tools might work well too.
Great instructions with clear, precise photos. I found this very helpful with only one observation to add: For me, the most difficult part of this repair was affixing the new adhesive. I received an adhesive kit that comes on a peel-away template. It would have helped me, and I imagine others, if there was some demonstration of how to go about installing the new adhesive from the template on which it comes. Otherwise a great tutorial. Thanks, Mark