@Gigawatt121 opinions on what should be one vs. what should not? (I do research use of instructions for my PhD)

@simulo hard to say. It depends. I think for things like how to draw with very technical instructions on proportions etc,.it's better to have text that you can refer to and can take time to study rather than follow along. But for stuff like taking apart a piece of equipment, it helps to see what is being done rather than just referring to a manual.