I called LEM today to see if their metal gears would work in the Northern Tool Kitchener 5 lb stuffer. http://www.lemproducts.com/product/1470/Vertical_Stuffer_Parts They said that they were not sure if they would be compatable. (Both the LEM and Kitchener stuffers look identical except for advertising labels in pictures.) Has anyone repaced the gears with metal ones? Which ones did you use? I would love to know if anyone has been able to get metal gears for their Kitchener before I order these to see if they will work.