My trigger finger has bypassed the rational part of my brain again, and I have a Sienna Sunburst player mustang bass incoming. This comes with PJ pickups with a master volume and master tone on the control plate, and a three way switch on the pickguard by the lower horn. In addition to fitting a Fender hi-mass bridge I am planning to improve the wiring. Initially the idea was to simply swap the switch for a blend pot, but it has struck me that I could just wire it as a Jazz bass with a volume fo