  Let $G$ be a locally compact Polish group. A metrizable $G$-flow $Y$ is
called model-universal if by considering the various invariant probability
measures on $Y$, we can recover every free action of $G$ on a standard Lebesgue
space up to isomorphism. Weiss has shown that for countable $G$, there exists a
minimal, model-universal flow. In this paper, we extend this result to all
locally compact Polish groups.
