First, an apology for not getting back on this sooner. Real Life(tm) reared its sometimes ugly head.
Tammi, your site was one of the first I found when researching the problem with the 301A. Great information and I have followed your suggestions. Here are several pictures of the bobbin case area. Hope you see something obvious and fixable. I added more shots than you asked about but since a picture shows more than I can describe thought it may help. And the part number on the bobbin case is
45750.
[ATTACH=CONFIG]468816[/ATTACH] [ATTACH=CONFIG]468817[/ATTACH] [ATTACH=CONFIG]468818[/ATTACH] [ATTACH=CONFIG]468820[/ATTACH]
Cogito, what a wonderful offer. I may have to take you up on it if the above pix don't show anything.
sjdal, I hope some of the information I'm getting here helps with your problem child, too.