Originally Posted by
PaperPrincess
It's often suggested purchasing a second bobbin case if you are planning on making lots of adjustments, like when you do bobbin work.
that's what I did for my 6600. Actually ... my original bobbin had a slight burr in the ring. When I showed it to my dealer to ask if it was still OK to use, she said sure but bobbin holders are fairly cheap and why not get another and use this one to "play with". It was worth it.