Originally Posted by
KenmoreRulesAll
Another option is to have the bobbin case machined to accept standard 15x1 needles. ManicMike has all the details!
Not sure if I'm allowed to post the URL as it's on my blog, so do a Google search for "Singer 320K2 bobbin case mod" and it comes up first. The 319 bobbin is the same as the 320.