Relative error on the average surface mass density Σ(< R) as a function of radius from the BCG for the single plane best-fit models of mock mass distribution 2. Left: cluster halo only. Right:cluster members only. In each plot, the three lines represent the single plane model (dashed black), the model where we assumed constant mass-to-light ratio (light blue), and the model where we assumed spherical galaxies (red) as compared to the input simulated cluster (solid black).