I've built up the CGS113 Wave Mult v1.1 board. If I'm not wrong, on this version there are pads and space on the board for the caps across the op amps which are described in the accompanying text on Ken's site as being helpful if the op amps go into self-oscillation.
Is there any reason not to install them all before first power-up? Does the circuit perform better without them, assuming the op amps remain stable?
Thanks in advance,
Guy.