MitoGraph has now a variable _improve_skeleton_quality that can be deactivated by the flag _precision_off. When this flag is on, the algorithm expands isolated voxels and isolated pairs of voxels so that the edge tracker is able to detect them. In addition, when this flag is on, the algorithm searches for connected component and forces every one to have at least one junction voxel so that no cc will be missed by the edge tracker.