2.1 Large dents: bottomside MFL contour plots, before and after annealing, B=1.8T: Figure 4 shows MFL signal contour plots (radial component) for the large dent samples, with dents from 3mm to 8mm depths. In comparison with the small dent results of Figure 3, the deeper dent signals display similar features but are generally larger in scale as expected. As with the smaller dents, the central peaks remains largely unaffected by annealing, while the shoulder peaks disappear or shrink considerably. Both the small (Fig 3) and large (Fig 4) dent results exhibit similar patterns before and after annealing. We are able to conclude from these results that the central MFL peaks are largely due to the dent geometry, although these peaks experience a size reduction with annealing which suggests a small stress contribution. The shoulder peaks, however, appear to be almost entirely stress-related, since they are diminished significantly, and often completely, during stress-relief annealing.