Looks like your problem is solved, but I just wanted to add my 2 cents for whatever it may be worth. I have found that my Pfaff does not like Coats & Clark thread. I've heard other Pfaff owners say the same thing. I donated all my C&C spools to my quilt guild's recycle shop, switched over to either Gutterman, YLI, or signature thread and have had no more headaches r/t shredded thread.