This is the machine, not the attachment. They were created from the old Singer 15s. I just can't get it to keep a proper tension. The top thread just lies flat and I can see the bobbin loops on the top of the fabric. I've loosened the tension and tightened the tension on the machine with the same results. Haven't tried the bobbin tension yet. Frustrating. Any thoughts? I'm somewhat new to sewing, so don't be afraid to insult me with the basics
