Angle of the jets to the line of sight θ_LOS as a function of the intrinsic jet velocity β, constrained by the western-to-eastern jet ratio R (blue) and the apparent maximum velocities for eastern jet (red) and western jet (orange) for observational blocks 1 and 3. The allowed parameter space for θ_LOS and β for eastern and western jet is highlighted by the red/orange-shaded region, respectively. The dashed and dash-dotted lines indicate the uncertainty range. We do not find a common parameter space for both jets and both blocks. The assumption of intrinsic asymmetry is therefore contradictory to our results.