I just used Norm's maintenance guide to make a few adjustments. http://www.normleete.co.uk/?page_id=28 I had two sticky keys, one wobbler, two squealers and an occasional whiner. http://www.normleete.co.uk/?page_id=28 After following the pad and roller adjustment directions, I still had one squealer. A 1/4 turn less pressure on the pad fixed it.