Newton–Leipnik — dx/dt = −a·x + y + 10·y·z, dy/dt = −x − 0.4·y + 5·x·z, dz/dt = b·z − 5·x·y. Classic chaotic (a=0.4, b=0.175). RK4, not Newton basins, not Rabinovich–Fabrikant (y·(z−1+x²)+γ·x), not Nosé–Hoover (y, −x−αzy), not Rucklidge, not Wang–Sun, not Lü, not Chen, not Lorenz butterfly. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.