I would think the print layer resolution would spoil the effect since it would produce non-convex regions and extra equilibrium points. It could be smoothed by post-processing, but presumably polishing/sanding would get you into the same trouble. The article goes into how the shape "almost doesn't exist", which would seem to imply great precision is required. I'm wondering how they manage to machine the shape in metal..
Large print size helped. Highest resolution. We filed down a few imperfections very carefully with a lot of testing as went and got one that worked well. It has to be very precise.
