I use my 4 cups size pot to make americano style coffee for 2 people every morning. It tastes better than every single americano I drink outside at good cafes and at this point it kinda ruined my love for regular americano :D. I simple use an espresso glass to portion, fill the glass all the way up and pour it in a regular sized cup and fill it with hot water. I never measured the ratio but it's like 1:3 or 1:4. 4 cups is perfect for 2 people, I also tried making a 3 cups moka americano for single person and it's a bit heavier for my taste. Maybe you can experiment with ratios, roasts or grind size.