After seeing the animations and reading the article, I am somewhat skeptical about the stability of these orbits. They are rather long and have plenty of near-misses. Even if they are stable in the sense of a pure 3 body problem, at close distances stars don't behave as point objects anymore. Instead, you have things like tidal forces and matter around stars.<p>Additionally, all the near misses makes it difficult to calculate the orbits, even with variable step size.