I just bought a passive bass with an active tone control. I'm probably going to take those parts out and swap them with 2 EMG 40dc and a EMG BQC control. From what I was reading, this runs or at least CAN run on 18v. The bass I bought only has a small, tightly packed control area so I'm going to need route work done and I don't have the tools or the skilled hands to do this. What cost am I looking at to have someone route out a section to fit an 2x9v box generally. I realize prices very from location and reputation of services but I need just a ballpark quote. Is this generally possible without ruining the overall paint job?