Louene, I would like to clarify a few things with Magna Glide Bobbins. You are stating you are having issues threading your needed with this bobbin. Is that correct? With longarms, tension can change if you have switched threads. Have you used Magna Glide bobbins in the past? If not, an adustment on the bobbin case might need to happen. Thread that is dark in color is a bit thicker than thread with less color and will need some attention to tension. If you have any questions about my reply, please feel free to continue this discussion at info@fabricbash.com. I would love to get you up and running with Magna Glide bobbins. Cathy