  We re-address the self-intersection region in a figure-eight shaped
center-vortex loop containing a frequently perturbed {\sl BPS monopole} subject
to a core-oscillation frequency $\omega_0$, rectifying a numerical error in
estimating the system's radius $r_0$ in comparison to the spatial
coarse-graining scale of infinite-volume thermodynamics. Implications are
discussed. We also compute the lowest frequency $\Omega_0$ of a spherically
symmetric plasma oscillation within a {\sl neutral} and spatially homogeneous
ball-like region of deconfining phase in dependence of its radius $R_0$. For
$r_0=R_0$ we compare $\omega_0$ with $\Omega_0$. We point out how the
idealisations, which are assumed in this work, will have to be relaxed in order
to address the emission of electromagnetic radiation and of non-intersecting as
well as self-intersecting center-vortex loops away from the surface region of
macroscopically sized plasma balls.
