Some misc thoughts.
Actually, one way to define "evil" is self-centered, and "good" as altruistic. Self-centered does not necessarily imply such things as sadistic or malicious for their own sake. In fact, such acts are more likely the result of stupidity, capriciousness, or insanity than anything else. Orcs and Baleraphs are good examples of those. But, the stupid and insane are a minority... the vast majority of people are at least of medium intelligence. Evil may simply believe that they're right, and others are wrong.
Take the Spanish inquisition from our own history, for example. These nominal Christians were not altruistic in the least. Absolutely convinced of their own rectitude. Definitely deserving of the label "evil."
I don't know why I'm posting this. Bored this morning I guess.
Bottom line, I wouldn't say that this new Mechanos leader who "does not consider himself evil" is necessarily an exception. For example, do the Archos consider themselves evil? Probably not. They think they're right and everybody else is wrong.
Lemon isn't really a food, though historically it was excellent for preventing scurvy and was easy to add to a ship's water supply. Otherwise, it's more of a spice or a condiment. Oranges may be better if you want a food. Of course, depends on what art you have.
Also, might possibly increase or attract herd animals. (I live in Maine, and open quarries that have salt deposits definitely attract deer and moose.)
Leto Atreides would like to have a word with you.