Compare to my CV P ( SD SPB-1 and Fender 63 pup), i found CV Jazz stock pup sound thin. So, Before make decision to swap with other good sounding + expensive pickup, i did some string swap and tone cap test for my used CV jazz.
I prefer do this test with Amp EQ flat (Fender Rumble V3 200/115 combo).
With broke-in Sadowsky 40-100 flat + .047uf cap, the tone sweet spot position around 50%, the Low ,mid low and treble is nice, but lacking some mid and less fat/ warm. With .022uf cap, tone sweet spot position around 30%, the mid and treble is really sweet sounding. Just become lacking some low and low mid.
Tone is clean and clear, less warm and fat sound.
With broke-in Labella 760FL + .047f cap, tone sweet spot position around 70%, overall sound warmer, deeper and Scoop than Sadowsky flat with same capacitor. Change to .022uf cap, tone sweet spot around 50%, overall sound become balance than .047 cap, just the Hi less present. It sound not sweet like Sadowsky + .022cap, but the Low is present and sound thick.
Tone not as focus and clear as Sadowsky, but warmer and fat sounding.
So, i keep play with Stock CV jazz pickup + 760FL + .022uf cap , because i prefer warm tone. Also when both pickup blend, the low and mid-lo wont drop volume as much as Sadowsky.
If i get new pickup, Sadowsky flat must strung in my CV jazz.
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In other side, because the broke-in 760FL sound very dark and pillow sound with my CV P (.047uf cap and mostly i play at the position between Neck and Pickup ). Swap with the broke-in Sadowsky flat, it sound become acceptable and better focus. I will put back the Fender 63PUP and a new .033uf cap soon.
JUST my opinion.
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My next test is try to fix unbalance volume stock CV jazz pickup, flat pole Jazz style pickup syndrome. Some expert advice me try lower those pickup's E string side more than suggest height. But i prefer 3mm on neck pup and 2.5mm on bridge pup to make this thin sounding stock pup in good output . Some magnet is in ship.
I found place the screw on top of the pole could solve this problem too........