Auto-brewers are not modified on Vanilla+
You may sometimes find that some potions are not brewed correctly, this will almost always be a result of TPS fluctuations (or you've run out of materials in your brewers).
Simple Auto-brewer
This Autobrewer type is commonly called a "HCF Autobrewer"
These styles of Auto-brewer are by far the best in existence due to their extreme simplicity and speed.
Advanced Auto-brewer
This style of Auto-brewer is similar to the previous style, except it is changed to be a "1wt" (one wide tile-able) version, which is more effective if you need a large amount of potions.