I also use BIAB with my Korg microArranger. I use BIAB chord output to play styles on the microArranger, especially songs with Jazz chords that are very difficult to play left hand voicing on the microArranger due to its small (and short) keys.
What a clever way to use the instrument, dralion...bravo for your ingenuity.

The
small keys presented a
big problem for me as well(I tried the microWorkstation, which has the same keyboard), and was not too pleased with how difficult it made voicing jazz chords.
Ian