Reliving this post as I've read it thoroughly to actually create my custom shop Player II Mustang Bass. So long story short, I was a bit undecided to whether to go with the Squier Classic Vibe Mustang or the Player II Version just because of the looks (and somehow I still do) but at the end as I had a Pure Vintage 58 laying around at home, I decided to put it to a good use and have a more varied tonal selection.
So the upgrades I decided to make:
Stock Pickups -> Fender Pure Vintage 58 P, Seymour Duncan STK J2B (This one is AWESOME), checked out pickup height so they are even
Aliexpress Performance Tortoise Pickguard -> Fits like a dream
Pots and Wiring -> Instead of the default modification of swapping out the toggle switch or use it as the producer switch, I asked my bass tech to set up a set of electronics of Volume / Tone (With OD 0.047) / 4-way Rotary Switch (PJ Series, P, PJ Parallel, J)
Racing Stripe (Still not sure if it will remain there, but aesthetically looks somewhat cool
Strings: GHS Precision Flatwound Short Scale (these guys were a surprise!)
And I believe that would be it, I started to consider swapping out the bridge with my P-Bass because it has a Hipshot Fender style bass (like the ones used by Mike Lull) so I give this Mustang a better look and bring the ashtray back to the P-Bass, but not sure yet.
Have to say I'm in love with these short scale basses ! (and I'm 6'4" lol)