Fundamental plane for the simulated SDGs calculated with the parameters estimated for our clean ATLAS^3D sample. The black line denotes the one-to-one relation and the green line shows the best fit to our simulated SDGs (solid circles, coloured according to the dynamical B/T ratios). The rms is 0.19 and 0.18 for the least squares regression (dashed green lines) when considering velocity dispersion within R_eff and central velocity dispersion, respectively, and the corresponding regression for the one-to-one relation (rms = 0.19 for both cases) is shown by dotted black lines.