Notes. The presented numbers for the precision clusters refer to clusters with fluxes of F< 9 × 10^-12 erg s cm², i.e. clusters without high quality observations already studied through eHIFLUGCS. The values in parentheses denote the fraction of clusters with precise X-ray properties compared to the total number of clusters for each exposure time. The considered numbers show the total number of clusters, the number of clusters with relative temperature uncertainties of ≲10%, when assuming the redshift to be available, and with relative uncertainties of ≲10% in temperature and redshift in the case of unavailable redshift.