My recently acquired Pedulla Pentabuzz has a problem. The output on the P Pickup is extremely uneven. The half that is on the G and D strings is almost completely silent. It sounds as though there is almost no output. The half on the remaining strings is very present,. The J Pickup is fine with full and even output across all strings. I have adjusted the pickup properly and to the extremes, still there is no output on the one half. I have soldering experience, so fire away with your suggestions. Thanks in advance. I would hate to send the bass away for repair; it is my only one.