I understood that you
wanted to draw things with any and all locations within .005 of their
desired location. This is inconsistent with a .008 feature width.
I don't know what method you plan to use to transfer this to the
part, but I'm confident that defining the width of a nut string groove
which is .008 is too tight for a 600 DPI laser printout. This width
is 4.8 dots.
I've been 'playing' for a while and I do know that a notch that is
only microscopicaly too wide will buzz. I think they have to be Vee
shaped and if long, such as on the nut, the fret-facing side should be
guaranteed to be the narrowest - to guarantee pinching the string.
Sometimes, a piece of paper, forced into the notch by the srting
tension can cure the buzz.

Looking with a jeweler's lupe, the thin notch is really thin on the
Martin, but the bass notch is actually wider than the string. The
position of the peg is such that the string is pulled to one side of
the notch

On the other hand...Take the easy way out. Making it 5 x, turns that
8 mill notch into 24 dots width. Sounds better, but I don't really
know the required tolerance.