I have heard talk of people using two truss rods in their bass necks as opposed to 1 and carbon fiber reinforcements. I am wondering, if a guy was to use 2 truss rods, how would he go about doing it.
Theoretically the man has a 6 string bass neck, 2'' at nut, 3 1/4'' at 24th fret. When using 2 truss rods, he would router the channels to each side of the center of the neck, correct? how much distance would he put between the rods?