We replaced all of the rollers. Bought the roller assemblies since we had never done this and were not sure what it would take to remove the shafts of the old ones to re- use. . We followed the video with the exception that our dryer controls are at the back . It took about 90 minutes. Dryer was quiet. In retrospect we could have just ordered the rollers as the shafts are easily removed and ours were not damaged. Have the vacuum ready as it’s a great time to get many years of lint from the inside. Great customer service to help me determine the correct parts!