Amelia, I wish I could reach into the computer screen and tweak up your tension for you. Wonderful tray!!! Those are the most amazing machines - they were WAY ahead of their time and just beautifully made. Could you shoot a pic of the back of the machine, too? I'm thinking there is a little plate that covers up your disks for your stitch selectors. That machine has the least complicated stitch selectors I've seen - the disks go in from the back and just in the front of the machine is the lever to choose which stitch. Very clever.