X-ray spectra obtained during the campaign (M1→M14, including the simultaneous M4N, M8N and M13N NuSTAR observations plotted above 10 keV) plotted on linear scales, and with the same factor of ~10 extension range (from bottom to top) in the y-axis scale intensities. These are shown to illustrate the important and complex variability as a function of energy up to 2 keV, and its gradual reduction above 2 keV, and up to 30 keV.