I want to ask another thread question on this thread about thread. I recently bought the Bernina 740. I love this machine and would recommend it. Anyhow. I took the two classes at the Bernina place, which is another thing I would recommend doing. But, I think the one thing the instructor told us about thread might be bs, She told everyone to go home and throw away all of their thread. Don't keep it for very long because it gets dirty. ???? It goes bad according to her. I don't believe it and think the next thing she wants me to do is to come back to that store and buy only what they sell there. Someone also mentioned JoAnn during the class and was told that was a bad word and not to say it again. Bernina sells a great machine, but this teacher got carried away I think.