Our Korg Polysix is fitted with a reproduction KLM-367 board and midi. Unlike other Polysix all keys work on this one and it is nicely in tune.
We believe the Polysix would be much more sought after if it did not suffer from it’s dreaded battery corrosion issues. However, once these are resolved, the Polysix is not a synth to be reckoned with. It sports 6 SSM laden voices with analog FX that are to die for.