Same as Fig. 6 with r₀ = 1/2 r_d (left, w₀ sin i = 840 km s⁻¹ arcsec⁻¹) or r₀ = 2 r_d (right, w₀ sin i = 210 km s⁻¹ arcsec⁻¹). As noticed earlier, the plateau velocity v₀ is barely constrained when r_d ≲ r₀ (right), i.e., when the disk extent only covers the inner solid-rotation part of the velocity field. This has, however, only a small impact on the determination of redshift z and CVG w₀.