Jack,
Look at this dutch site, they make also the specific software to use the SD2 with a KN7000. http://www.muziekhuisdera.nl/show_product.php?prod_id=390&selectie=4&ag=Modules/Expanders

Regards,
Impuls/Soryt
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Genos2,Korg Pa5X , Yamaha YC61, Ventilator2 . : https://www.youtube.com/channel/UCmC6hdAR1v5lYN8twfn0YbA