I have had an awesome experience with Nordstrand getting a custom MM5.4 to fit my now main bass - Dillion VMB-500. The bass is a clone of a '79 MusicMan 'Ray with an extra string in nearly the same dimensions as a 4 stringer! Love this bass. BUT Love it more since getting the pickup in place. I'm shocked at how much this one change improved the overall balance and tone of the bass. The best way to explain it is that there is more of everything to work with. Clearly the original pickup (which wasn't all that bad to be honest) had a distinct tone that was missing clarity and definition in the mids that no amount of EQ would enhance. Now, WOW. So as a benchmark through my build (should really post more details of it) I compared the sound to a 2009 'Ray 3EQ. I built a pre and used the stock pickup and the sound was really quite close to the "real deal", like really close. After the swap, well, I've sold the "real deal" as this ended up even better than it! Quite shocked actually, I wasn't expecting it to be "better" in the end, but soooo glad I did the work. I've had the bass out during all of the changes at various points (ie just a passive stock bass, then pre amp in, then pickup.). Each time before the pickup it was okay, drummer noticed it was different initially, but never really got tone compliments. Then, with the pickup, unprompted, was getting: "wow, what did you do to your rig? It sounds amazing!?" All the pedals and tweaks I've been through have not made this much of a difference. Again, if you need something to really bring out clarity or need a custom fitted pickup, go Nordstrand. They were easy to work with and didn't charge a whole lot for a custom build. They squeezed a MM5.4 into a 4 string cover size, and set custom pole spacing. Couldn't be happier with the service or product!!