Tracey Browning shows how to upgrade your super motors with the notched belts and pulleys in this video. After putting your motors back onto your machine, you should run the motor auto-adjustment, calibration, and drift test. Even though you won't have altered the motor brackets, it's best to run the drift test just to make sure they haven't been accidentally knocked out of position.
This is the link to watch the video on Youtube.
And this is the link to Tracey's web site, Constantine Quilts.
