Product review (2 stars): You Must tide the scrwes under nit of it
When you take it out of the box, look under nit of this machine. You'll see two little screws on the center. They're both lose. Their purpose is to hold of the shake. If you don't tide them done, they'll become miss thread after the first use, and machine shakes badly. The gentleman on the above video is saying to remove those bolts. I don't know how it will work then. mine got totally broken, and the seller sent me another one and the other one also had lose screws, and I tided them done. I haven't used it yet. just tie them. It's very easy.