[supereal]

At our machine shop we have a "flywheel grinder" designed for the job. We resurface all flywheels to remove evidence of wear. It does reduce clutch chatter, of course, but that is a product of the original torque tube design which transfers rear axle movement to the motor mounts and clutch linkage. Practice in operating the clutch pedal will help, but that chatter is an artifact that will always be with us.