im making a 34 inch scale neck (pretty standard fender j size) and i am about ready to put in a truss rod. this is my first neck so i am trying to keep it on the simple side. i was thinking dual action truss rod because the slot can be square. im not sure how long the slot should be. also should i use stiffening rods in the neck? i am going for a fairly thin neck. i would rather have the adjustment on the body end of the neck for the truss rod. im just not really sure how to do this.