With a washable metal filter there’s no need to use filter papers.
Preparation guidelines for the CoffeeGator: https://coffeegator.com/blogs/blog/146238791-beginners-guide-to-pour-over-coffee
Setting the Baratza Grinder: Settings may vary slightly from machine to machine - and the optimal grind size size may vary from coffee to coffee and to differing personal preferences. So it’s always best to experiment and establish which setting gives you the particular grind size you want for any given coffee and serve. In this case, CoffeeGator recommend the coarseness of sea salt, however a slightly finer grind would work well too.