Comparison of the best fit NuSTAR spectral parameters of individual observations and flip-flop states fitted with Model 1, dscor*tbabs*constant*(diskline+diskbb+cutoffpl). The spectra are distinguished by their corresponding fluxes, timing properties, and their flip-flop state classifications. The first NuSTAR observation has been excluded, as its spectrum had a negligible black body component, and therefore differed too greatly from the spectra shown here. The blue dashed line in the graph of diskline normalisation as a function of flux, depicts a line of constant equivalent width, assuming no change in spectral shape at an energy of 6.4 keV. This is a reasonably good assumption, as is demonstrated by Fig. 18. The two blue dashed lines in the diskbb normalisation graph indicate the average values of this parameter for flip-flop and non-flip-flop spectra. One dim flip-flop observation featuring a type C QPO has been omitted from the graph of the high energy cutoff for display clarity, as this parameter was not well constrained in the spectral fit of this particular observation, having a best fit of . We also excluded one bright state, and three late flip-flop data points from the graph of Betor₁₀, as the fits were insensitive to this parameter, and the errors in the measurements could not be determined.