I’ve dialled in some beans from my local roaster that taste great but they’re just slightly bitter
I don’t want to go overboard when decreasing the ratio though and want to know what a good amount is to decrease the ratio by incrementally until I reach the flavour I want
I use brew ratio for finetuning: when I think my coffee is just a tiny bit too bitter, I would decrease output by maybe 1 - 2 grams. When I think, the effect is too little, I would grind a little coarser instead.