Hey, So i bought a 1305 (mid 90's model) and it has a stock preamp. The knobs are volume, blend i think, and then two stacked knobs, one for mids and one for lows I think. I want to install a new preamp including new pots and knobs. What are my options? i am a noob and I dont want to have to drill or otherwise modify the bass itself. Just pull out old wiring and preamp, solder new one to pickups and battery harness and rock. Thanks for any help!!