A comparison of the observed emission line ratios (black bars) with the best model (yellow bars) found by the multi-line analysis and the W14 model found via the classical BE99 method (blue bars). [O I]λ6300 is reproduced by both models, the plot therefore zooms in on the weaker lines. We see an overall agreement of the observed data with the two models – especially with the optical BE99 lines. The [O I]λ5577, [N I]λ5198, and [N I]λ5200 emission lines, however, are substantially overpredicted and the [S II]λ4068 and[S II]λ4076 lines are heavily underpredicted in W14. The near-infrared lines of sulphur and nitrogen are well reproduced.