Results from Test 3b (unbinding). Left panel: particles in a 20 kpc slice through the centre of the halo. Blue (pink) dots refer to halo (stream) particles. The dashed grey circle corresponds to the location of the input virial radius. Middle panel: v_ral – r phase plot, with the same colour coding as in the previous panel, showing that the local escape velocity unbinding does not succeed in pruning the stream. Right panel: v_z – v_x phase space, keeping the colour coding as in the previous plots. The purple cross, dashed circle, and solid circle indicate the converged centre-of-mass velocity and the 1σ_v and 3σ_v regions, respectively. Particles outside the latter are pruned by the velocity space unbinding.