Comparison of the bright (red) and dim (black) flip-flop spectra fitted with Model 2, with the spectral parameters initially set to the best fit values of the dim state (a). By setting the inner disc temperature of the bright flip-flop spectral fit to its best fit value, we obtain fit (b) and close most of the gap between the two spectra. In plot (c) we additionally modify the compPS normalisation of the bright state spectrum to its best fitting value. Most of the remaining difference between the two spectra is corrected for by the change in N_H (d). Finally, in plot (e) we show the residuals of the best fits to both bright and dim spectra, with completely independent parameters.