Stephen S Winchester , MA February 09, 2016 Once of the plastic wheels on my guide roller assembly calme loose causing the plate to jam on occasion Replacing the wheel manually did not work well as it would soon fall off again. With the proper tools and work space I may have been able to do a better repair job. Instead I ordered a replacement assembly. It was rather more expensive that I thought it would be but it arrived quickly. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes