Diagram of the projected rotation velocities (v_e sin i) versus peculiar 1D space velocities (along the line of sight, RA and DEC on the top row), as well as plane (2D) and 3D peculiar velocities (bottom row) for the full VFTS single O star sample. We exclude 32 objects with GAIA RUWE above 1.4, as this potentially indicate a poor fit or an unresolved system. The boundary of the RW desert obtained via line-of-sight velocities (v_e sin i > 210 km s⁻¹ and δv_los > 60 km s⁻¹) have been corrected on the bottom row to account for the 2D and 3D nature of the observational constraints using scaling factors of and , respectively. The one object in the avoidance region in the 3D velocities panel displays δv_dec ∼ 175 km s⁻¹ and δv_plane ∼ 200 km s⁻¹, namely, values that are so large that they do not appear on the respective panels.