Let’s say I’m brewing perfect v60 cups for my taste and don’t want to change the flavor as its not too sour or bitter. However I just want it a bit weaker. What parameters would I change? Could I just add a little water after the brew? If I used less beans or more water during, I’d think it’d mess with the extraction.
Just add water to the final product.
It’s possible to weaken it with less coffee to water ratio but it will likely mean a change to other parameters like grind size to get back to the neutral flavour you want because it will increase the water filtering speed. It’s just easier for strength to add the water at the end.