Korg DW8000, Mono/Poly, MS-20...

I've recently finished a run of Turbo Boards for the DW8000;  after
the pre-ordered units, I have two left -- will sell them for $70
including US shipping.
This board increases the onboard memory from one bank of 64 programs
to eight banks of 64;  it allows assinging a split point to play two
different patches simultaneously, or to layer two patches for a very
complex sound.
Details can be found in the Turbo Manual, in the files section.