I would like to replace the stock electronics in my passive bass. I plan to completely remove the bridge pickup, fill in the cavity and replace the no-name neck pickup with a SD SSB-5n or EMG 40hz. Naturally I will no longer need the pickup selection switch and would like to remove the tone knob as well. How can I safely remove these switches from the system while having them set correctly for play so that only the volume knob remains? I've heard that a built in pre-amp is important with passive pickups, is there one that would work well with this configuration or is it not important unless one wants tone controls on the bass?