Surface density and temperature profile, and predicted υ = 1 → 0¹²CO P(9), ¹³CO R(4), C¹⁸O R(6), and υ = 2 → 1¹²CO P(3) and ¹²CO P(4) line-profiles for a model with N_H at R = 6 AU three times larger than the best-fit grid model (N_{H (R = 6 AU)} = 3 × 10²³ cm^-2). The higher N_H enables to describe the υ = 2 → 1¹²CO P(3) and ¹²CO P(4) line-profiles while keeping a good fit to the υ = 1 → 0 lines. The model has the same temperature structure and same surface density at R< 6 as the best-fit grid model (thus δ_gas = 3.3 × 10^-3). The cumulative flux plot shows that the υ = 2 → 1 lines are dominated by the contribution at 6 <R< 10 AU. Errors in the plot are 3σ, and the dashed horizontal line is the 5σ limit.