I am looking at a Tobias USA Killer B 4 string. I was all ready to snag it, but the issues it has have made me decide to ask those more in the know. So here are the questions/issues/comments: 1) The pickups seem to be wired wrong. In the middle position of the pan pot, there is practically no volume. I looked inside and of course it's a mess of wire. Has anyone ever experienced this with these basses/barts? Are there factory wiring diagrams for this bass or similar? Is this going to be an easy fix? For the most part, I'm pretty good with electronics, but the use of the "black box" style preamps, not to mention 2 in 1 bass, have me a bit confused. 2) What does a 4 string like this usually sell for? It's red, it has a bit of a chip on the stringer portion of the headstock (on the back, in the "circle"), it has some poorly touched up scratches on the lower waist portion (can't see from far), but other than that, it looks nice. No case, no neck tool. I appreciate any and all help, advice, info.