Ideas on an on-board EQ circuit for guitar

[DanielWong]

How can I build a parametric EQ circuit on a guitar, focusing on specific freqencys? I want something similar to the circuit on Frank Zappa's guitars.

[Seljer]

something like this: http://www.diystompboxes.com/smfforum/index.php?topic=50853.0
depending on how much space you have

somebody on here also just put a regular wah-wah pedal circuit in their guitar, to get those resonant fixed-wah Zappa type tones

[DanielWong]

Um, on an EQ, those sliders are just pots right?