"Most people that don't use a tone pot will not use a cap, but if you want to use one you can put it between the volume and output jack or use a switch for cap/no cap choices.
If you're using a round piezo, you might want to use a cap on…"
"hey Paul, I couldn’t agree more with your J Bass recommendation. Two volumes and a psycho knob for me. This is way better than a three way, as a 50% X 50% middle spot may not be the sound someone is looking for."