I have been reunited with my bookbinding tools! Also I have some free time to do more experiments now.
This bind has 84 holes. 84! It’s a bit ridiculous. But other than the prep taking forever, the actual sewing is straightforward. I wrapped the spine about 10.5 times to get the length of the string. 5.75″(14.6cm) wide, .25″(.64cm) thick.