Long story short, I've got a Polysix with a dead KLM-367 board. I can replace it with:
1: A brand new one for $160 + up to 12 weeks wait time. Drops right back in.
2: The Kiwisix board + rebuilt power supply board for $550 + probably a couple of weeks wait time. Of course, there's a bit of installation work needed as well.
On one hand, the price for the stock board is the most attractive. On the other hand, it would be cool to have a full sized midi controller again, have the ability to be externally clocked, and to have the damn thing up and running in a shorter time period. If anything, I'm most drawn to getting it fixed ASAP.
Anybody have any experience with the upgrade? Worth the $$? I bought this as a dead Polysix, so I've yet to even hear it