I agree with the rest of the posters, Jamie Wallen's video is what turned my tension issues around for my Queen Quilter (Tin Lizzie). The video is not for pre-wound bobbins, but ones that you wind yourself & is not specific to any one machine. I did switch over to Glide thread & the magna-glide prewounds & my tension issues disappeared. Can't beat the price either. The TNT video is great too. Glad you solved the issue. Sometimes our machines just decide to be finicky sometimes & straighten themselves out. Go figure!!