Sprott–Linz Case T — dx/dt=y, dy/dt=−x+yz, dz/dt=a−y². Classic a=1. Dual a+scale sliders (scale chrome-only). Display embed (x,y,z). Distinct from sprott-linz-a…s.html, sprott.html, langford.html. Bulk centroid ≈ (−0.7441, 0.0004, −0.0003). RK4 chaotic fold. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.