I'm setting up a friends Squire P bass for her. I went to put the allen wrench in the truss rod to snap the neck, but the things stripped. I was able to make some adjustments to her, but the stripped rod is not allowing me to snap the neck any further. What are my options here? Do I try a larger allen wrench or should I just call it quits? I was able to lower the action a good deal with what adjustments I was able to make, but its still about a 1/4 of a mile off the fretboard now. She wants it nice and low.