By the way Keith,
thank you for asking the question. Decided to midi the sd2 to my PSR instead and only use the OMB/sd2 setup when I use my clavinova ( my Clav's a straight piano , no styles)
Wouldn't have investigated the psr option if you hadn't asked the question.
I'll probably use the psr's left & right hand voices for melody, & the SD2 for styles.

best wishes
Rikki