A belatedly Happy birthday to you too, fellow Pisces.
I'm now 46, not far behind you.
Some info about guitar pickups you mind find of interest:
726-750 - Seymour Duncan/Basslines
(paragraphs #742 and #743)
Guitar Pickups Simulation
**broken link removed**
I think we're going to end up adding a high input impedance buffer by the time we're through.