Collimation profile of the receding counter-jet (left) and approaching jet (right) derived from MODELFIT components at all frequencies and epochs. Only fully resolved components located at distances larger than one beam from the core and with FWHM larger than half the beam minor axis are included. The fit power-law indices are consistent with those obtained from the pixel-based analysis (see Fig. 6), confirming the parabolic expansion of both jets. The shaded Fit Error band is included in the legend but is very small compared to the data scatter and thus not easily visible in the plot.