I so identify with this issue on tension, I had the same thing happen, fine one day, go back the next and it is off. I had a White jeans machine, I finally decided in the interest of mental health to let it go and donated it, I found a really nice "used" viking when someone else upgraded, and I am enjoying quilting now.I was so close to giving it up, so not worth the frustration. They are alternatives even if you can't afford the fancy new machines.