Test of the Chandra photon weighting implementation developed in the present paper (Sect. 3.1 and Appendix B). The Figure shows the ratio between the parametric Chandra density profiles derived with the weighting method developed here (pre-correction) and those published in V06/V09 (post-correction). Profiles are scaled by n_{e,0.15 R500} to compare the shape. Legend as for Fig. 1. Also as for Fig. 1, deviations in the core (r< 0.5′) are due to the different centres used for profile extraction.