Jean-Luc Pickguard

I don't know anything about their basses but I think when I was a Student in the early 80s, I used to eat their boil-in-th-bag curries.

Can you post pics of your control & pickup cavities and your wiring? Are you able to check that the shielding is continuous with a multimeter, also using the multimeter to check that everything in the loom that should be grounded is also continuous? I can post some info on how to do this, but if you prefer to be hands-off, take the bass back to your luthier and tell him it is still humming.

You could be disappointed if changing your pickup doesn't reduce the hum. Have you checked the circuit? If the output jack is wired up incorrectly this can cause untold amounts of hum. Also shielding the bass's cavities (and the back of the pickguard) using copper tape with conductive adhesive — often sold as anti-slug tape, can work wonders in reducing hum.

My Ding-a-ling — Dave Bartholomew

Angels With Dirty Faces — Sham 69

Robert Plank

Spinal Fap

Wet Peg

About 80% of what I play

Doggin' Around — Jackie Wilson

I've never seen this style of bridge, it isn't the most aesthetically pleasing piece of irnmongery I've seen. I do however remember the 1982 Fender Precision Bass Special Walnut looking like this, having seen them at the time:

Piece of Shih-t(zu) — Wet Leg