Think “Grammar!”
When you learn any new language, you have to think about the various rules of grammar. Once you know the language you no longer have to think about the rules … at all. For example, when you speak your native language, I’m sure you never form the sentences in your head first (with proper grammar) before speaking. (Okay, nowadays we have to think about PRONOUNS!)
In the early days, the blend machines had no DC meters. Hinkel watched what his operators were doing (how they found the balance of currents) and only then he put meters on the machines to discover more precisely what they were doing. Hinkel formulated the “Units of Lye” chart based on what people were already doing. Not the other way around.
And, this is exactly how grammar is developed. “Rule makers” create “rules” in language based on how people are already speaking. The language comes first … and the grammar is formulated later. (That’s why grammar is never perfect.) The first mistake was when Hinkel (actually Bill Schuler) put a “unit computer” on the machine and started to tie people into this “rule nonsense.” (Hinkel himself was opposed to the “unit computer.”) I also emphasized the “chart,” and other manufacturers computerized the whole damn thing.
If I owned a school, I would cover up all the meters and gizmos and have the students find their working point organically using their hands and eyes. Rules and computers cannot supplant the operator’s skill or judgement. You don’t have to break the rules, but you do have to know what constitutes a good treatment. These are two different things.