All went well, but happened to notice something mysterious on my Jazzmaster which I'd never experienced before... Either pickup on its own was fine, but in the middle/combined setting the amp would emit a constant, microphonic squeal/hum that would only resolve by turning the volume back.
Pickups are Seymour Duncan Jazzmaster Hot, RWRP for hum canceling in mid position. Anything that could cause this? I'd intuitively think that the middle position would have less overall noise and feedback than either pickup on its own, but...
