Sigh... New day, new problem... Today it's the bobbin. The thread isn't picking up at all, and only the top thread is sewing. I followed The Masquerade's video for fitting the bobbin in the shuttle when I got the machine and it worked fine. I had to change the bobbin since the one that came loaded came to its end. I've made sure the bobbin runs counter clockwise, pulled the thread through the guides and picked it up as usual. I've also made sure the the needle is threaded left-to-right, and tried different tensions on both the shuttle and the thread guide. I'm used to using round bobbins - this is the first shuttle I've had.