I just have a simple midi kit inside the polysix and was looking at the kiwi too but this seems like a very effective and simple option, a lot of polysix love these days.
i’ll have to check to compare the enhanced features it adds versus the kiwisix board-replacement upgrade package (one of the nice things about that is that problems that were due to damaged compoonents or board traces go away when the board is replaced).
i wonder if i could install this after installing kiwi6….
Don’t forget that you can always DIY your own Polysix upgrade with an Arduino Mega…(tooting my own horn here…sorry…but for those into DIY, you might want to know that DIY is feasible…)