Best-fit sedimentation efficiency f_sed derived from the Sonora Diamondback (top) and SM08 (bottom) model grids for our benchmark targets, with old (≥300 Myr) and young (<300 Myr) objects shown in red and blue, respectively. Although the “nc” models correspond to f_sed → ∞, we plot them at a value of 18 for visualization. For targets with identical spectral types and best-fit f_sed values, data points are slightly offset toward the upper right in these panels.