Line diagnostic diagrams for Sz 65 and Sz 66, together with reference disks from A. Banzatti et al. (2025, green) and slab-model predictions (gray). Values for reference disks are updated to JDISCS version 9.0 (see Section 2.2 of P. Mallaney et al. 2026). Left: the radius of the hot (850 K) component increases from left to right with the 6000 K line luminosity, and the warm and cold components increase from bottom to top with the 1500 K line luminosity. Middle: the warm component increases from left to right, and the column density decreases from bottom to top. Hollow symbols indicate line ratios after removing organic contamination. Right: the warm component increases from left to right, and the cold component increases from bottom to top. See Figure 10 in A. Banzatti et al. (2025) for related details.