Using two of the Quad PCBs, of course. I'll shortly be releasing a new version of the Quads (currently Version 3A) to allow for chaining of power and ground. I've moved to using multi-turn trimpots as they allow nulling of offsets. Lettering on the right side of the front panel needs to be moved a bit.
You can never have enough VCAs. Thank you to the Wiggler who commissioned it!
Power and ground are not connected between PCBs in this photo.