Product review (5 stars): Fixed it myself, saved a bundle
This was such an easy repair.  Once I flipped the machine up in front, it was easy to see the part that needed to be replaced. Found several options for the part online, read the reviews, this one even had free shipping Now it works great.  Note, there were similar parts with a metal inner ring and a review advised me against it, so I went with the all plastic(?) inner ring that would be easier to adjust if necessary.  It fit perfectly, no adjustment needed.