Well, I have SD pickups on a couple of basses...
My slightly tweaked Ric.
and my Red Baron faker:
Coincidentally, I have a P with a Status neck; it's a bit of a Frankenstein.
Also coincidentally, going back to your J, I'm trying out a J-style pickup on a Ric base for someone this weekend!
The Columbus wasn't a bad bass, but it was quite heavy.
My next bass was a Rickenbacker 4001, which I've still got.
Amp-wise, at some point I added a shonky unbranded 4x12 and another amp (I think it was a Maine, which was quite nice, as I recall).
Well, that particular one was in a bit of a state, with the neck detaching from the body and the fingerboard coming away at the headstock end.
I have one of those in better nick.
My first setup was a Columbus Jazz bass copy into a Carlsbro Stingray and a WEM 2x15.
I had another Stingray at some point; the one with the push-buttons for tone.
Well, it seems to work OK.
I reassembled the tone pot (I'd pushed so hard that the bottom half had separated, but it was just a matter of putting it back and bending the 4 tabs back where they should be) and filed the gunk/glue/whatever off the shaft so the knob would fit.
Whilst I'd got it opened I spotted that the bridge earth wasn't connected, so I soldered that on too.
I plugged it in briefly to check it out and it makes sounds.
That's £100 well spent...
Well, I put strings on it and it seems OK.
I also put a pair of straplock buttons on it; one hole was padded out with masking tape, so I had to put matchsticks & wood glue in.
I think I broke a pot too, putting a knob on with a bit too much "enthusiasm", so I'll be need to get my soldering iron out. Ho-hum...
I'll try using a bit of heat to strip off the finish; I've got another guitar where someone used elbow grease to strip it and left a load of gouges there.