As stated previously, the main issue is that the bridge pickup is always slightly longe than the neck pickup. Unfortunately the routs on the pre-2001 MIM J basses do not reflect this. I actually own a pre-'01 MIM Jazz that has this issue. I acquired a set Fender Original Jazz Bass pickups (great pu's btw) and ended up just literally FORCING the bridge pickup into the rout. It's working out just fine. It's kind of a cheap-o bass and I think I got the pickups for free so I totally don't care.