Congratulations on your purchase. You got a great deal. Stick with the HandiQuilter needles & bobbins or the Babylock branded needles and bobbins. A bad bobbin can be the source of many problems. There are so many different needle sizes/ systems out there. If you purchase the wrong one it could scratch your hook and cause problems. It’s easier to stick with the branded products sold for your machine. You could save some money, but it could also cause you problems.