Anyone ever need to purchase replacement screws for their Addi 46? I recently got a machine in "good" condition but after one use realized that it's missing a screw on the top. I think this is why it was starting to get a bit difficult to crank due to a bit of wobble. Before I start buying and trying to find screws to fit, I figured I'd ask to see if anyone else has any experience or recommendations on what to buy?