as you can see, there are several ways to handle the large spools. I have used all of them and most have been successful. I use a quart mason jar and put a bobbin on my upright spool pin and direct the thread around that and then thread the machine as usual. I keep the jar to the right of my machine so it doesn't get knocked over by the sewing. In respnse to a question about self threading machines. I believe that some of the newer machines have this feature. None of my do, but I am the queen of bobbins. I have at least 20 bobbins for each of my machines. When I start a project, I just load up at least a dozen bobbins before I start and then I don't have to stop very often. You can find all sorts of bobbins to fit your machine through a supply house or ebay etc.