Well Jes, people have come up with various ways to describe the amount of pressure they use for different tasks. The truth is, even if there were measurements, not everyone would agree that it is correct. I may push hard on the blade and someone may be using the same pressure and say they are hardly pushing on the blade. It all comes down to what you feel comfortable with. And, that may change as you get more familiar with the way you like to cut. The same goes for sanding and probably everything else. Don't get hung up on it or you'll go crazy. Just cut and enjoy. And, like the late Carter Johnson always said, "just have phun".