  We prove that for every countable discrete group $G$, there is a $G$-flow on
$\omega^*$ that has every $G$-flow of weight $\leq\! \aleph_1$ as a quotient.
It follows that, under the Continuum Hypothesis, there is a universal $G$-flow
of weight $\leq\!\mathfrak{c}$.
  Applying Stone duality, we deduce that, under \mathsf{CH}, there is a trivial
automorphism $\tau$ of $\mathcal P(\omega)/\mathrm{fin}$ with every other
automorphism embedded in it, which means that every other automorphism of
$\mathcal P(\omega)/\mathrm{fin}$ can be written as the restriction of $\tau$
to a suitably chosen subalgebra.
