I am working on a 1971 Fender Precision Bass. I am mainly a guitar guy and I wire up strats and LP's all the time so a single pickup bass diddnt look all that hard. I wired it up to factory specs, but when I roll the tone back, about 80% of the volume is gone. they are all original 250k pots, a .05 Mfd Capacitor, all works fine except for the drop in volume. is this normal for P-basses.