Hiya Meddle, every G&L I've had before these two had a low and level action from the nut to the last fret, it's the main reason for buying one for me, well apart from the versatility of it.
There is still adjustment left on the saddles albeit not much on the E & G strings, my problem is that the action starts off perfect for the first 3 frets or so and gets progressively higher all the way to the end which suggests to me that the nut is cut low?? I mostly play between the 5th & 12th frets, I've had the neck set straight as a die but it rattles if I try to get any lower which, could be down to a high fret here and there, I just don't know so I'm going to contact them to see what they can do.