On to my second build and I am installing some nordstrand P pickups np5. The pre amp is a ACG pre amp. When it comes to electronics Im not that clued up so take it easy on me. After I installed them there was a major buzz, (note: no strings on at this stage) I thought P pickups were supposed to be Hum cancelling? I had already shielded the cavity and grounded that and the pre to the output jack. So next I did an expieriment, I removed and roughly wrapped the the pickups in silver foil (around the outside of them) and then grounded across to one of the control knobs. Good that removed the the bad buzzing, almost dead quiet now. So its a shielding problem right? or have I missed something. As I said I thought P pickups were hum cancelling? Do I really have to go to the trouble of trying to somehow shield these pickups now? comon! really? I wouldnt know where to start. Please tell me Im a dumb ass and missed or did something wrong. I know this is probably not enough info so fire away.