I just got a Wolftone Marshallhead pickup fir the bridge of my Les Paul, which I love. However; the problem I am having is with squealing (potting is not an option). I play a high gain and when iI have the volume dimed on the guitar it squeals but when I back off to around 8 it doesn't. With the way that I play It's impossible for me to bring back the vol to 8 with any accuracy. Does anyone make a pot where it doesn't open up all the way or can be adjusted to about 80% of full on open?