Histogram of ΔL ≡ L_max−L_min for 100 Monte Carlo test particles initialised with a = 10 kau and q uniformly distributed on the interval (15,100) au. Here L_max (L_min) is maximal (minimal) magnitude of the specific angular momentum, as found during one revolution, T_rev, succeeding the initialisation of a comet at perihelion. In the MD simulation T_rev = 0.26 Myr, in the Newtonian simulation T_rev = T_Kep(a = 10 kau) ≈1 Myr. A single bin corresponds to a single test particle in the simulation. Solid bins are ΔL in the simple model of the MOC, shaded bins (here barely visible), stacked on the solid bins, are ΔL in Newtonian dynamics, with the gravity of the Sun and the Galactic tide accounted for.