My Fender J is also a Mexi. I've got to agree that they are great as well stock. But being an only child (we're a selfish lot) I wanted mine to look and sound dissimilar to anyone else's stock MIM J (don't get me wrong, they sound great stock!). I dropped in some Stan Hinsley high-output humbucking single-coils, a badass II bridge, replaced the plastic nut with a graphtech, grounded the cavities with copper foil, stuck a custom one-piece aluminum pickguard with attached control plate attached on, and changed the wiring from vol/vol/tone (treble roll off) to master vol/pickup blend/push-pull tone (treble/mids roll off). Did I really need to do
all of these things? No, not really. But with some DR Hi-Beam flats stuck on it, it can sing sweetly, or I can coax it to growl when I dig in a little more.

Definitely still my go-to bass, and my first "real" bass. (not a bargain bin find at the local pawn shop

)