Well all wise quilters, with the help of a very wise machine repair person, I learned the hook on my machine had a slight burr, but enough to make my stitches terrible. I don't know if I'm happy or sad. On the good note my FMQ has not gone haywire, but a new hook cost a considerable amount of money. My friend was able to file the burr out, but this part will need to be replaced sooner or later. I have an Bernina Activa 145 and one part of the bobbin hook used to made in plastic, they changed that part to metal now, but what I need is call a C hook for that machine. If anyone has one for a reasonable price in metal let me know. Grace