I bought a walking foot to see if it would help with quilting. It's a generic one for my older brother machine. At the bottom of the package is a website "for product demonstrations" . Well, the website doesn't work. I got it on and it works great (even if it still didn't help with the quilting-don't think my machine can take the bulk) It did come with an extra piece. I have no idea what it is or what to do with it. :~) its a bar with a hook on one end. looks like it goes in a hole on the back of the walking foot. any thoughts?