Originally Posted by katesnanna

I have adjusted the bobbin thread on several machines over time and nothing bad has ever happened. It's no use adjusting the top tension if it's not the one having the problem. I don't know who put the fear of a little screw in you ladies. Be brave - have a go_ just to get the feel of it. You can always mark the bobbin casing with a sharpie in case you want to take it back to factory setting. That little screw is there for a reason - to help you make your machine work at optimum level.