The switching jack in my Ric 4003 has been unreliable for as long as I've owned the bass. The least amount of movement on the plug causes one of the pickups to cut out or the output level to drop significantly. As a result, I haven't been able to trust the bass enough to use it live. Anyone have any suggestions for fixing this? The cavity is so tight that I think the jack gets distorted when it is installed in the bass. Has anyone changed their 4003 wiring to a simple mono output like on the 4003S? I don't expect to ever use the Ric-o-Sound feature (who really wants to drag a second amp to shows).