We recently started playing with the smaller size Yama cold brew tower. I can't find many recipes on line and was hoping someone might have some wisdom they could share. (Dialing it in is tedious when you only get 1 or 2 tries per day.)
Right now based on the sheet that came with it we are using 80 grams of coffee (have played with different particle sizes,) and 960 gr water/ice dripping between 20 & 30 times per minute.
Coarser ground coffee is to weak while finer starts to get to bitter. We can't really manipulate extraction through agitation or brew temp so dose/ grind combos are the key.