Keith, I did a 'search' on Yahoo's Group Forums and did not find a hit on the Technics SX-EX70 2. I also did a 'Google' serarch and likewise came up empty.
Just a thought. If your Auntie doesn't mind unloading that beast, ie., "sell it" - she could along with the proceeds then get a much lighter and more maneuverable Organ in lets say, a Technics KN7000. The KN7000 is an Arranger Keyboard and the Organs on it are absolutely fantastic. And she would have a bundle of 'different' type Organ voices too; such as a Drawbar, Rotor, Pipe, Elec., Theatre, Jazz, Hammond B3, Chapel, etc. All this in "one" Keyboard! And she would have tons of other type voices too, like Piano, Elec. Pianos, Harpsichord, Strings, Scat Voices, Brass, etc. More fun than a barrel of monkeys if you ask me.

PS: If she sings along with her playing, even though the KN7000 has a Mic Input and a Vocal Harmonizer, the Harmonizer is sub standard and basically unusable. But if she didn't necessarily need the 'harmonizer function', she could just switch the harmonizer part off and sing with just 'her' voice in the Mix with NO harmony.
This is just a suggestion. If your Auntie is set on keeping the Technics SX-EX70 2 so be it but like I said I found no User Groups on that specific Organ. I'm pretty sure if you do a Google search yourself you may be able to find a Forum on maybe "Manual Organs" or 'Organs' in general. But I found nothing in regards to the Technics SX-EX70 2 itself.
Best regards,
Mike
[This message has been edited by Idatrod (edited 09-15-2003).]