Originally Posted by
Snooze2978
I use a method I watched online by a guy whose name has escaped me. He shows you how to feel the tension in your bobbin by lifting it up by the end thread.
Jamie Wallen.
https://youtu.be/Q1mRhcquZTM?t=128
I have the video set to start right at where he explains the test, but it's well worth your time to go back to the very beginning of the video and watch the whole thing.