Given the proper command-line options, GCMC can produce an SVG image and, after some Bash fiddling and a bank shot off Inkscape, the same GCMC program I’ve been using to plot Homage Tektronix Circuit Computer decks can produce laser-printed decks:
Pen-plotting on yellow Astrobrights paper showed how much ink bleeds on slightly porous paper, but laser-printing the same paper produces crisp lines:
Laser printing definitely feels like cheating, but, for comparison, here’s a Genuine Tektronix Circuit Computer:
Plotting the decks on hard mode was definitely a learning experience!
Obviously, my cursor engraving hand remains weak.
The Smell of Molten Projects in the Morning 
These really turned out nice!
Much though it pains me to admit it, there’s a good reason printers wiped the floor with pen plotters. [grin]