I use Jamie Wallen's method too. There may be times when you want a bit tighter or looser tension for the bobbin. But golly, that method sure gets me good to go for the most part! I am think maybe for stuff like thread painting if you want to do that on your long arm, you want a bit more tension on the bobbin so the top thread pulls a tad further into the batting so no bobbin thread shows ever, just like on an embroidery machine.