Right then, I have my trusty Vigier Passion Series 3, which I'd like to get the action further down on. Now this is where it gets tricky, it has no truss rod. It is however fitted with a couple of carbon rods to strengthen then neck and keep it straight which largely it does very well. Trouble is I just can't quite get the action low enough for my taste, so I wanted to explore my options a bit. It has a zero fret which by looking at it, looks higher up than the other frets to create a kind of pseudo-nut. Is this normal to have it higher up ? I always assumed they were the same height and just acted like a capo, maybe I'm wrong. I've looked down the length of the neck and it looks pretty straight, but is it worth measuring how straight it is with say a steel ruler ? Is it feasible to shave down the zero fret at all, or even have it replaced with a normal nut, maybe even an adjustable one ? All advice gratefully received.