You can service the disk drive. It requires taking it apart, cleaning the heads, lubricating the motor and the drive head rails. It may also be a good idea to replace all the electrolytic capacitors on the Power Unit circuit board of the Electone.
Really nice performance. Feeling nostalgic haha. Do you still have those demo disks by Hector Olivera, George Fleury, Max Takano etc? I just missed hearing those performances :)