Projected mean (CRe-weighted) age of CRe since their last injection (in units of [Gyr]) by shocks (top row), AGNs (middle row), or star formation (bottom row) for two control resimulations at z = 0.02, which employed τ = 0.01 Gyr (model test_001, left panels) or τ = 1 Gyr (model test_time1, right panels) to solve Eq.1. Each panel is 21.25 Mpc across. No significant differences in the reconstructed age of the different CRe population are found.