Just masterful work, truly.
So a .5 mm nut is 1/50th of an inch or 20 mils... I can't imagine how you work with something that small, do you have one of those big, stationary magnifiers? I'm straining my reading glasses just to SEE the things!
Some day, maybe... some day.
Keep up the good work, you are an inspiration!
I have seen pictures of his workshop and unless my memory fails me, he does have one of those magnifier lenses, but still, you have a valid point in that although you can see the details with such a lens, it is still an art to have the steady hands holding tweezers to manipulate those incredibly small components. This is also a case of "Patience and Persistence are the necessary Virtues" scanarios!