Anyways, there is a Geddy Lee jazz bass near my house...yaddah yaddah. I see that the truss rod is kinda hidden by the pickguard. A reviewer on Harmony Central said he had to drill a hole in his pickguard to access the truss rod. Question: If the Geddy Lee jazz bass is a 1972 replica, could I simply replace the existing pickguard with a new pickguard that has a hole for the truss rod? The pickguard is 3-ply. I don't know if this is relevant.