okay, this is probably a stupid question, but here goes. i want a fender fretless jazz bass. but i want one when you take off the pickguard its like jacos bass. on my MIM fretted jazz bass, when you take off the pickguard theres a little "canal" type thing with some wires exposed by the conrtol knobs. i know jacos was a 60's or 70's bass, but i want a rather affordable one....thanks. one more thing, i dont want the fender jaco custom bass, hehe, not enough $$$.