Summary of the X shape fitting procedure for NGC 891. Top row: From left to right, we show the mean B field angle after binning the data (the dashed black circle in the bottom left corner indicates the beam size), the standard deviation of the binned pixels, and the number of pixels that were combined in each bin. Additionally, we show the fitted model, the 2D-residual, and the distribution of the absolute residuals for the best-fitting par model (second row), wedge model (third row), and const model (fourth row).