Thanks Ted for the hink, I'll look on the SX-900 to see if I can set manual bass.

Also, here yo go guys a great use of pedals:

https://www.youtube.com/watch?v=n2I6CIXv-XM

IMHO the VERY best way to play arranger IF you don't move it around is to add the lower manual, AND pedals. It's really nice with the lower as your not cramped into a little area for chords, and you can have access to all notes on upper for leads/melody etc. AND it is much more comfortable to have your L hand below and not so far left playing chords, after all that's all why they designed organs that way.

For not all that much effort and $ you can set it up easy.