K series and Hoffmann 1 cup V60

Hello hello, I've recently bought a K ultra and currently use a V60 for brewing. My previous go-to method for brewing was the Hoffmann 1 cup V60 method (15g, 5 equal pours to a total of 250mL water) and am finding that I'm way finer than I expected I would need to be. I started at around 7.5 and have slowly gotten finer to about 6 without hitting a wall of bitterness yet, but I've used a lot of beans to get to here. In the interest of not wasting loads more coffee dialing in, does anyone use this method and a K series grinder here, and if so what grind setting do you find yourself at?