John, I wouldn’t throw away the old one. Maybe sand down the outside diameter to match the new one and save it for a spare, or your next project. I’d use a belt sander to ensure all side edges are nice and square. maybe could have done that and saved $$$. These things are not rocket science. The “tail” on your old one still looks unworn, often that part gets worn and loose in its slot, the “tail” actually seals the input side of the “wobble” from the output side.
Joe B
