A PJ on the left, and an American Performer on the right.
I sold off my other basses to pay for the upgrades to these, which include nitro finishes, Spitfire pickguards, Hipshot lollipop tuners, bone nuts, and reflector knobs. The PJ also has Aguilar pickups, a high-mass bridge, a Switchcraft pickup selector switch, and a Stellartone tone knob. The American Performer has pearl dots, which were easier to install than I'd expected. I'm planning to add "clay" dots to the PJ.
The neck on the PJ was actually taken from a Pawn Shop Mustang that I've since sold, so the fingerboard is rosewood rather than Pao Ferro. That Pawn Shop neck is considerably slimmer than the neck on the American Performer; it's like having one Mustang with a (short) Jazz neck and another with a Precision neck.
I currently have flatwound Chromes on both of them. The Aguilar pickups on the PJ are very warm and woolly, so I'm probably going to keep using Chromes on that bass, and may try out a set of LaBellas on the American Performer. I've used LaBellas on a Mustang in the past, and they sound great, but they're not bright.
Aesthetically, I'm not a huge fan of the Jazz pickup on these basses (especially the American Performer), but I've found it adds a lot of flexibility. I felt that the Pawn Shop Mustang lacked definition in a live setting with its single humbucker. I could have tried using roundwound strings, but I hate how they feel on my fingers, so getting a Mustang—or rather, two Mustangs—with a bridge pickup was a better solution.
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