The magnetic skeleton of the initial field (a) and b)) and the final equilibrium field (c) and d)) viewed from two different angles showing the lower/upper nulls – blue/red spheres, spines – thick blue/red lines, separatrix-surface field lines – pale-blue/pink lines and separator – thick green line. General field lines are drawn around the lower/upper initial null’s spines (lilac/orange). The pale-blue/pink thick lines indicate where the separatrix surfaces from the lower/upper nulls intersect the boundaries of the domain. The equilibrium plots (c) and d)) include an isosurface (purple) of the parallel current drawn at 20% of the maximum value in the equilibrium field.