So I am about to buy a 1998 Warwick Fortress One and the bass is in really good condition for being that old. Its in dire need of a cleaning but that's about it. However, there are two things that I am concerned about. 1. It has Treble and Bass Boost knobs on it. When you boost the Bass, or turn it up, the overall volume of the guitar goes down?? 2. Bass has an Active P/J pickup configuration. For some reason the P Pickups are considerably louder that the J. So the guy I'm buying from has the P pickups pushed down to the wood and the J pickup pulled out super high to try and compensate (which doesn't really) So is this stuff easily remedied or am i looking at buying new electronics? Oh and the price of the bass is $800 which hes only willing to drop down to $750.