Originally Posted by Melody

I sewed several long stitches with white thread on top and black in the bobbin for better visual. There is some improvement, but even more improvement when I set the number at 3 on the tension dial.... which is in the zigzag area and that can't be a correct setting. So I'm trying to unscrew the knob to get the discs off and boy, is that tight. I can't get it unscrewed. hmmmm. Am I in danger of damaging it if I force it?