I have a new Bernina 830. I thought it would be a dream of a machine but have lots of trouble with it. Right now I have a hard time finding thread that won't break. If I use 2 ply it won't break. Only problem is: I have one spool of 2 ply that I know of. Most of my thread doesn't say how many plys it is. Most of my thread is more than 2 ply so it breaks. Is there a name of a thread that is 2 ply for sure?