Power of water stream
Many Coffee Brewers and Baristas are not aware that the height of the water stream during the pour-over process can have a big effect on the final result.
If you pour the water into the filter from high up, the stream is stronger and can go through coffee grains fast and easier. If you pour from a lower altitude, the stream is not as fast and goes through the coffee grains more softly and slower.
Only be sure you are constantly pouring the same amount of water with same speed. With this, you can change a lot in coffee. The prepared coffee can be over extracted, or under extracted. This is another activity what you can’t do with automatic or semi-automatic coffee brewer machine. Usually, this machine pours from the same high level.
I recommend moving up to down in a circuit.