I have two questions regarding truss rod adjustments on an American Professional (jazz) bass. I tried searching for the answers, but couldn't find exactly what I was looking for (perhaps I was using the incorrect terminology). My bass came with the usual Fender T-Handle wrench and I was able to set the bass up without any problems, however I just don't feel comfortable using the ball-end design of the T-Handle wrench and the way it feels like you're slowly rounding out the nut each time, no matter how careful I am. Is there an alternative tool which would give me more grip? And my second question is whether it's possible to replace the nut with a vintage style slotted truss rod nut (cross-hair) or are these not compatible? Thanks!