I am trying to restore my mothers old Sunbeam mixer. The model listed is as best as I can read it. It is rather old and also has a add on vegetable cutter that runs off of the mixer itself. I have put it together and it runs but is very stiff. I repair appliances and was very surprised when my sister gave it to me after twenty years of sitting in the basement. The model # is questionable. Any help would be appreciated. I want to restore it to give to my daughter.