The bobbin winder on my Tin Lizzie overwound and I couldn't get it adjusted. A "good" wind was when it over wound about 10 yards that I'd have to throw away. A bad wind would add the 10 yards then wrap around the spindle for another 10 or so. i got tired of standing in back of my machine watching the bobbin winder... I also didn't like the fact that you had to run the machine to wind the bobbin.