How do they not know where the spring goes, they worked on it. Sorry, sounds like they don't know what they are doing. Are they authorized to work on babylocks. I'd go to a different shop if I were you. Maybe contact babylock with your problem if its still under warranty, you might be able to mail it to them directly to fix if you aren't confident in your dealer. That's one thing to always think about when buying from dealers is what their ratings are. Not all are authorized babylock dealers