Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

As far as battery holders go:

There actually are holders with a much smaller rim. They almost fit the
holes on the PCB (both old and new). Usually I bend one pin outward and
solder it flat onto the surface; however with the new PCB it might even be
feasible to bend both pins slightly inward and fit them through the holes.