the s1-switch on my jazz always gets stuck, which seems to be an all-around problem, and i´ve already consulted fender via e-mail in order to inform them and to find a solution to this malfunction. sadly it seems they don´t take care of their customers that much, since a week has past after my inquiry. lubing it , as some have suggested, might be a proper solution. but in spite of that i intend to replace the s1-knob with a standard jazz bass knob since the s1´s appearance does not appeal to me. now my question: will a standard knob fit on the s1- pot so can modify it to a decent push-pull contraption or is there a difference in the measures of those knobs.