High-eccentricity collapse of the equilibrium spin, normalized by the Hut value, as a function of x = nτ_M. The points show numerical zero-torque equilibria for 0.7 ≤ e ≤ 0.9, selecting the highest-frequency stable branch when multiple stable roots exist. The black curve shows the empirical envelope fit in Equation (B7). The lower panel shows the fractional residuals. The fit is intended for the early high-eccentricity transition from solid-like to fluid-like response.