Fustain: "a term which includes a variety of heavy woven cotton fabrics, chiefly prepared for men's wear." The Encyclopaedia Britannica 1910
fustian: "a hard-wearing fabric of cotton mixed with flax or wool with a slight nap." www.thefreedictionary.com/fustian
I keep winding the warp for fustian and will prep the loom. I have entered the info into my weaving software and it will tell me how many heddles I need on each shaft. So when I get tired of standing at the warping board, I can go count heddles.
I will also get from my weaving software a drawndown of what my draft will look like. It helps me check for errors.