I almost bought some pre-wound bobbins (the ones made of cardboard) when I first got my Brother embroidery machine. It advises against it in the owner's manual. IT said the machine wouldn't work properly with them. I don't think that machine would work properly if you look at the wrong way, though. I bet the bobbins would be great for my other machines. I see you ordered some, and I hope they work great. Let us know.