  This paper studies finite Morin configurations $F$ of planes in $\mathbb P^5$
having higher length. The uniqueness of the configuration of maximal
cardinality $20$ is proven. This is related to the stable canonical genus $6$
curve $C_{\ell}$ union of the $10$ lines of a smooth quintic Del Pezzo surface
$Y$ in $\mathbb P^5$ and to the Petersen graph. Families of length $\geq 16$,
previously unknown, are constructed by smoothing partially $C_{\ell}$. A more
general irreducible family of special configurations of length $\geq 11$, we
name as Morin-Del Pezzo configurations, is considered and studied. This depends
on $9$ moduli and is defined via the family of nodal and rational canonical
curves of $Y$. The special relations between Morin-Del Pezzo configurations and
the geometry of special threefolds, like the Igusa quartic or its dual Segre
primal, are focused.
