This paper studies finite Morin configurations F of planes in P5 having higher length-a question naturally related to the theory of Gushel–Mukai varieties. The uniqueness of the configuration of maximal cardinality 20 is proven. This is related to the canonical genus 6 curve Cℓ union of the 10 lines in a smooth quintic Del Pezzo surface Y in P5 and to the Petersen graph. More in general an irreducible family of special configurations of length ≥11⁠, we name as Morin–Del Pezzo configurations, is considered and studied. This includes the configuration of maximal cardinality and families of configurations of lenght ≥16⁠, previously unknown. It 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.