Cass,
Two things to pass on to you.
I don't think anyone knows more about these G and E Roland keyboards then Diki unless it would be Fran.
I also am aware that there are a lot more answers and a place to post bug reports that are confirmed and then sent on to Roland. maybe you are already there as I am.
Go to: http://roland-arranger.com/index.php?option=com_frontpage&Itemid=1
Best regards,
Bebop