Multi-scroll Chua — dx/dt = α·(y − x − g(x)), dy/dt = x − y + z, dz/dt = −β·y; g(x) = m2·x + ½(m1−m2) Σ_{k=0}^{4} (|x+(2k+1)| − |x−(2k+1)|) with m1=−1/7, m2=2/7 (Yalçın/Suykens-class). Classic α=15.6 β=28. Dual α+β sliders. Distinct from chua.html double-scroll piecewise diode, Sprott Jerk, San-Qi, Yu–Wang, Liu, Lü, Chen–Ueta. Bulk centroid ≈ (−0.07, 0.00, 0.08). RK4 multi-scroll. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.