Do any of you own a quilters star 1780, and if so do you have a problem filling bobbins? Mine will not fill a bobbin. The manual says use class 15 bobbins, which I have, but they won't fill. I can fill bobbins on my Brother machine and they work fine in the quilters star. I know White Sewing Company no longer makes this machine. If you have this machine will you let me know the exact brand of bobbin you use? Thanks so much.