Relative tolerances for changes in ArCTIC trap model parameters based on the Euclid requirement for Δe₁ in galaxies, as a function of the minimum observed size A_obs,min included in the analysis. Larger tolerances mean less strict calibration requirements. We show results for the well fill power β, and the densities ρ_1,2,3 and release time-scales τ_1,2,3 of all trap species considered by I15 (cf. their Table 3).