Low spectral resolution (R = 30) L-band visibilities of the model combining the best-fit continuum model, from Sect. 3.2.3, with a C-CH disk component. Different inner radii of the C-CH disk are explored – see the legend on the left hand side. The telescope pairs, projected baseline length (B) and the position angles of the projected baseline (B_PA) are shown in each subplot. The measured L-band MATISSE visibilities are overplotted in light blue solid line (with error bars).