To replace the synthetic nut on my guitars, I usually use bone. But in this case I tried the Graph Tech nut as an option. It looks similar to bone but it is not as hard as it. You have to carve it with care, because the nut file takes much easier material off it. Otherwise it makes it easy to make it fit to the fretboard radius on the bottom. Tonal it makes no difference to my ears compared to bone. This is a nice option to regular bone nuts. I'm gonna see, if it is reliable as bone.
OK so I've filed this down carefully to fit into my Strat neck with all the frets already in place. It's a very nice material to work and fits well. The neck has not yet been fitted to the body, so I will update this report later.