That is fantastic work, a good use of some beautiful wood. Like everyone else, I'm going crazy over that super black ebony fretboard.
I have some Steinberger Gearless tuners, and I think they're fantastic. They keep you in tune really well, and they're easy to fine tune, easier to restring than regular tuners, if only they were a comparable price. Obviously they are wasted if you've got a locking nut. They feed into the tuner very low, very close to the surface of the headstock, which I would think means you wouldn't need a string retainer, though I see hufschmid used one here.
So in short, love Steinberger Gearless, love ebony, love that guitar. Good work!