i've had this warwick corvete fretless 5 for a couple weeks, and i'm having trouble getting the tone i want. it plays great and has a fine "feel" to it - it's a warwick... but i'm not getting enough output on the B and E strings, even though i've raised the pups. the G sounds a bit thin as well. the bass is a 1998, and has the standard MEC js on it. i've got warwick roundwound strings on it. any suggestions for an upgrade? what makes this bass's voice really sing?