The most recent Bernina tech guy, the one who made the bobbin tension tight, said I should never adjust the bobbin tension myself, but that only a tech guy should do it at each annual service.
Do others agree, or are all of you adjusting the bobbin tension yourselves?
And why would two Bernina dealers have totally different ideas about what is the correct bobbin tension?
Isn't there a right and a wrong answer on this?
