Moderate to extreme rotators, grouped from bottom to top first by line-broadening parameter, then by luminosity class, and finally inversely by spectral subclass within each of the former parameters. VFTS numbers are given on the left vertical axis and the full spectral types on the right. Left panel: radial velocities from Sana et al. (2013) relative to the cluster means (vertical bar). Right panel: projected rotational velocities determined mostly by Ramírez-Agudelo et al. (2013) but some by SSD for this paper with similar techniques; squares indicate SB1 not included in the former reference and bars denote the uncertainties.