I have a '63 American Vintage P-Bass that I bought used for a back-up bass. I checked it out when I bought it and everything is stock, but lately i've been rolling the volume back to fade out during songs and noticed the the taper seems weird. Most of the volume drops from 10 to 9 or maybe 8-ish. The rest of the travel is hardly noticeable? Does this seem right to P-bass users? Thought I'd ask before I take it apart and inspect further.