Originally Posted by
nativetexan
I never used pre-filled bobbins. do use Connecting threads Essentials threads mostly.
I use prefilled bobbins even in my touchy Bernina. The paper backing is suppose to be taken off and many don't know that. I don't use the prefilled plastic bobbins in my machines because I have different brands of machines. Superior Threads has a chart of every machine type and what bobbins to use.