Fitted kinematic and morphological radial parameters of the CND from ^3DBAROLO modelling of the HCO⁺(3-2) and HCN(3-2) transitions in the B6SB dataset. The top two panels show the ^3DBAROLO fitting results and the associated uncertainties after the second fitting iteration, while the bottom two panels show the fit results and uncertainties from the first iteration as scatter points with the regularised radial parameter profiles overlaid as solid curves that are used in the second iteration. The SMBH + Miyamoto-Nagai disc rotation curve fit is overlaid in the top panel as a red dashed line.