Looking for advice/tips. Thinking of putting new pickups on MIM fender jazz. I am attempting to make the hiss/hum noise go away. I use a sansamp bass driver for my pre amp and I understand that these will amplify any noise you already have. Certinly true in my case. Its not creating noise, I can hear the same thing without it just not as loud. I'm wondering if this is the right solution (new pickups). sympton 1 - buzz increases if your not touching the strings symptom 2 - buzz increases or decreases depending which direction your facing and the angle you stand relative to the floor. I can almost get it totaly quiet if I'm bent halfway over facing east on a full moon. This makes recording very interesting. I figure just getting new PU's is the way to go BUT I also hear that most on most jazz basses the neck and bridge positions are different sizes and the same size on the MIM's. Mine are both 3 5/8" wide. I was leaning toward the dimarzio ultra jazz. Are these different sizes? If so am I looking at having to break out a router or something? Can someone put, say, two neck PU's in if there the right size? Or is this a no-no. Whatever's the quietest and doesn't break my wallet. Thanks for any advice.