The resulting age-h_Z trend from the set of mock density distributions for a double exponential model. The left panel shows Component 1 (h_Z1), while the right panel shows Component 2 (h_Z2). The input density models had both h_Z1 and h_Z2 increasing monotonically with age in five bins (0–3, 3–5, 5–7, 7–9, and >9 Gyr), with h_Z1 ranging from 0.2 to 0.6 kpc and h_Z2 from 1.0 to 1.4 kpc (shown by the dashed lines). We applied random errors of 30% to the mock ages, and measured the structural parameters using our density fitting method. The fitted values with error bars are shown as points. This demonstrates the method's ability to recover the general trends of both disk components, despite the introduced age uncertainties.