Assuming that component C6 is ejected by a single black hole, we applied the precession model and calculated χ²(i_o) in the interval 2° ≤ i_o ≤ 50° starting from 6 different values of the inclination angle, namely i_o = 5°, 50°, 40°, 35°, 30°, and 20°. Solutions with γ< 30 only exist in the interval 2° ≤ i_o ≤ 17°. Top panel: curves χ²(i_o) calculated starting from 6 different values of the inclination angle. Bottom panel: bulk Lorentz factor γ of to the solution χ²(i_o).