PSF-subtracted residuals of knot and inter-knot regions in the Hα line. As with Figure 8, profiles are summed over a 1″ width and normalised before subtraction. Note that Knot A in this line is markedly different from the same knot in the FELs, and that the relative offsets in all the knots are much larger than their FEL counterparts. This is most likely due to the behaviour of the bow shocks in the knots.