Beware of messing with the truss rods on a 4001!!!
This is the model you have to loosen the rods, move the neck to where you want it to be, then re-tighten the rods with the neck clamped in place.
Not the sort of thing you can achieve in the living-room. You need a luthier or proper tech to do this.
4003s are ok though - same as any other truss rod adjustment, just double!
G.