Reduced noise residual plot for all 91 iron lines (top panel), 81 Fe i lines (middle panel) and 10 Fe ii lines (bottom panel) for the 1D (red line) and 3D (black line) analyses. Notable improvements can be seen in both the line core and red wing asymmetries under the 3D analysis, which are seen clearly in the 1D analysis. Small differences between the Fe i and complete iron line sample exist but notable differences between the Fe ii and the Fe i lines can be seen. However, this is most likely a result of the number of lines in each sample.