Hi,
Thanks for the reply! Argh, I thought i can easily find those 10KAx2 pots with on/off switch, cos i've actually built my cmoy 90%, it's working very well, tested it with croc clips for the input without a pot at max gain. the problem now is that my casing does not hav sufficient space for a pot and spdt switch, so either the spdt switch or the pot has to go, and i have decided to include the pot instead...
Btw is there a way to modify the circuit so that the cmoy is switched on only when the headphones is plugged into the input jack? This will allow me to use a cheaper pot and do away with the switch. Thanks in adv!