I am looking at trying out a Duluxe American P Bass and have an opportunity to purchase one locally for $700.00 w/case. It plays well but haven't yet been in a position to connect to an amp to hear it. The bridge pickup has been changed out to a Bartolini pickup with a 3 way switch added in between the rear two tone controls knobs. I believe it is used for a front/back/both setting for the Bartolini pick up. The work looks good but I am concerned that the modification would decrease the value. Anybody have some thoughts or experience with this?