to luckydenny regarding thread.
I used to think there was differencein serger thread but tried it in my machine. works good although it leaves more lint by needle so I clean that out. maybe if I had larger eye needle it wouldn't do that but it seems strong and not easy to break. Maybe others have more opinions too.
Only prob I see is bit more lint, but some brands seem to be more linty than others . Oh, I also wind lots of bobbins in generic colors too.( Gray or white)