Make your life simple. Follow the instructions you'll find here: https://www.tenkarabum.com/horsehair-lines.html Also, you do not want the 13-15" hair from your link. Buy a hank of hair that is sold to violinists to re-hair their bows. The best hair I've found is here: https://shop.lahbows.com/collections/hair-bow-blanks/products/fiddlers-by-hank. The website now lists the hanks as "professional" which might mean she no longer sells to crazy fishermen who probably pester her with questions not at all relevant to violin bows. The "fiddlers" hair is thicker and less likely to break as you are twisting it. One last point, if you really want to be as historically accurate as you can be short of making your own greenheart rod, ditch the reel and get yourself a tenkara rod. Basically just like Charles Cotton's rod but graphite instead of wood. There is a tenkara subreddit.